diff --git a/messages/de.json b/messages/de.json
index f467801d0..aed18e997 100644
--- a/messages/de.json
+++ b/messages/de.json
@@ -11364,7 +11364,9 @@
       "molybdenum": "Molybdän",
       "iodine": "Jod",
       "water": "Wasser",
-      "caffeine": "Koffein"
+      "caffeine": "Koffein",
+      "dha": "DHA (Omega-3)",
+      "epa": "EPA (Omega-3)"
     },
     "page": {
       "title": "Nährstoffaufnahme",
diff --git a/messages/en.json b/messages/en.json
index 6afd60c39..35723dfa1 100644
--- a/messages/en.json
+++ b/messages/en.json
@@ -11364,7 +11364,9 @@
       "molybdenum": "Molybdenum",
       "iodine": "Iodine",
       "water": "Water",
-      "caffeine": "Caffeine"
+      "caffeine": "Caffeine",
+      "dha": "DHA (omega-3)",
+      "epa": "EPA (omega-3)"
     },
     "page": {
       "title": "Nutrient intake",
diff --git a/messages/es.json b/messages/es.json
index 8a5ba0bf7..64529adbb 100644
--- a/messages/es.json
+++ b/messages/es.json
@@ -11364,7 +11364,9 @@
       "molybdenum": "Molibdeno",
       "iodine": "Yodo",
       "water": "Agua",
-      "caffeine": "Cafeína"
+      "caffeine": "Cafeína",
+      "dha": "DHA (omega-3)",
+      "epa": "EPA (omega-3)"
     },
     "page": {
       "title": "Ingesta de nutrientes",
diff --git a/messages/fr.json b/messages/fr.json
index 5d3bd5fd1..4d1c39ec0 100644
--- a/messages/fr.json
+++ b/messages/fr.json
@@ -11364,7 +11364,9 @@
       "molybdenum": "Molybdène",
       "iodine": "Iode",
       "water": "Eau",
-      "caffeine": "Caféine"
+      "caffeine": "Caféine",
+      "dha": "DHA (oméga-3)",
+      "epa": "EPA (oméga-3)"
     },
     "page": {
       "title": "Apports en nutriments",
diff --git a/messages/it.json b/messages/it.json
index adaf75f83..6d895f5d6 100644
--- a/messages/it.json
+++ b/messages/it.json
@@ -11364,7 +11364,9 @@
       "molybdenum": "Molibdeno",
       "iodine": "Iodio",
       "water": "Acqua",
-      "caffeine": "Caffeina"
+      "caffeine": "Caffeina",
+      "dha": "DHA (omega-3)",
+      "epa": "EPA (omega-3)"
     },
     "page": {
       "title": "Apporto di nutrienti",
diff --git a/messages/ko.json b/messages/ko.json
index e958a666a..89f97da2a 100644
--- a/messages/ko.json
+++ b/messages/ko.json
@@ -11364,7 +11364,9 @@
       "molybdenum": "몰리브덴",
       "iodine": "요오드",
       "water": "수분",
-      "caffeine": "카페인"
+      "caffeine": "카페인",
+      "dha": "DHA (오메가-3)",
+      "epa": "EPA (오메가-3)"
     },
     "page": {
       "title": "영양소 섭취",
diff --git a/messages/pl.json b/messages/pl.json
index 4cf8b75a8..2330eb0e8 100644
--- a/messages/pl.json
+++ b/messages/pl.json
@@ -11364,7 +11364,9 @@
       "molybdenum": "Molibden",
       "iodine": "Jod",
       "water": "Woda",
-      "caffeine": "Kofeina"
+      "caffeine": "Kofeina",
+      "dha": "DHA (omega-3)",
+      "epa": "EPA (omega-3)"
     },
     "page": {
       "title": "Spożycie składników odżywczych",
diff --git a/src/__tests__/contract-stub-inventory.test.ts b/src/__tests__/contract-stub-inventory.test.ts
index 0d71bcd34..8c2b4784d 100644
--- a/src/__tests__/contract-stub-inventory.test.ts
+++ b/src/__tests__/contract-stub-inventory.test.ts
@@ -54,16 +54,11 @@ const CONTRACT_STUBS: Readonly<Record<string, readonly string[]>> = {
     "environment.travel_suggestions.get",
   ],
   "labs/[id]/links/route.ts": ["labs.link."],
-  "medications/[id]/ingredients/extract/route.ts": [
-    "medications.ingredients.extract",
-  ],
-  "medications/[id]/ingredients/route.ts": ["medications.ingredients.put"],
   "medications/[id]/links/route.ts": ["medication.link."],
-  "nutrients/catalog/route.ts": ["nutrients.catalog.get"],
 };
 
 /** The size of the register when it was written; see the header. */
-const REGISTER_SIZE = 23;
+const REGISTER_SIZE = 20;
 
 function routeFiles(): string[] {
   return walkSourceFiles(API_ROOT, { floor: 400, extensions: [".ts"] })
diff --git a/src/app/api/medications/[id]/ingredients/route.ts b/src/app/api/medications/[id]/ingredients/route.ts
index 5a025adce..5f24af7c6 100644
--- a/src/app/api/medications/[id]/ingredients/route.ts
+++ b/src/app/api/medications/[id]/ingredients/route.ts
@@ -8,20 +8,50 @@
  * re-counts every taken dose of this medication into the day's micronutrients
  * (`recompute.queued`). Needs the `nutrients` module.
  *
- * Contract authority: `requireRecordAuth("manage", "medications")`. Until the
- * composition lands the stub resolves the caller's own record only.
+ * MANAGE: a composition rewrites what every past dose of the medication adds
+ * to the record's micronutrients, the kind of change the level names. C1 (the
+ * rate bucket keys on the actor) and C4 (the audit row files the composition
+ * it replaced).
  */
 import { NextRequest } from "next/server";
 
-import { apiHandler, requireAuth } from "@/lib/api-handler";
-import { returnAllZodIssues, safeJson } from "@/lib/api-response";
-import { notImplemented } from "@/lib/http/not-implemented";
+import { prisma } from "@/lib/db";
+import { apiHandler, requireRecordAuth } from "@/lib/api-handler";
+import {
+  apiError,
+  apiSuccess,
+  getClientIp,
+  returnAllZodIssues,
+  safeJson,
+} from "@/lib/api-response";
+import { auditLog } from "@/lib/auth/audit";
+import { invalidateUserMedications } from "@/lib/cache/invalidate";
 import { withIdempotency } from "@/lib/idempotency";
+import { annotate } from "@/lib/logging/context";
+import {
+  canonicalComposition,
+  compositionSummary,
+  toIngredientDtos,
+} from "@/lib/medications/ingredients/composition";
+import { enqueueSupplementNutrientRecompute } from "@/lib/medications/ingredients/recompute-job";
 import { requireModuleEnabled } from "@/lib/modules/gate";
+import { checkRateLimit, rateLimitHeaders } from "@/lib/rate-limit";
+import { overwriteDetails } from "@/lib/sharing/audit-details";
 import { medicationIngredientsPutSchema } from "@/lib/validations/medication-ingredients";
 
 type RouteParams = { params: Promise<{ id: string }> };
 
+const PUT_RATE_LIMIT = 30;
+const PUT_WINDOW_MS = 60_000;
+
+const INGREDIENT_SELECT = {
+  nutrient: true,
+  amountPerUnit: true,
+  unit: true,
+  enteredAmount: true,
+  enteredUnit: true,
+} as const;
+
 export const PUT = apiHandler(
   withIdempotency<[NextRequest, RouteParams]>(putIngredients),
 );
@@ -30,11 +60,37 @@ async function putIngredients(
   request: NextRequest,
   { params }: RouteParams,
 ): Promise<Response> {
-  const { user } = await requireAuth();
-  await params;
+  const { user, actor } = await requireRecordAuth("manage", "medications");
+  const { id } = await params;
   const gate = await requireModuleEnabled(user.id, "nutrients");
   if (!gate.enabled) return gate.response;
 
+  const medication = await prisma.medication.findUnique({
+    where: { id },
+    select: {
+      id: true,
+      userId: true,
+      ingredients: { select: INGREDIENT_SELECT },
+    },
+  });
+  if (!medication || medication.userId !== user.id) {
+    return apiError("Medication not found", 404, {
+      errorCode: "medications.notFound",
+    });
+  }
+
+  // C1 — keyed on the ACTOR, so a manager burns their own allowance.
+  const rl = await checkRateLimit(
+    `medication-ingredients:put:${actor.id}`,
+    PUT_RATE_LIMIT,
+    PUT_WINDOW_MS,
+  );
+  if (!rl.allowed) {
+    return apiError("Too many requests", 429, {
+      headers: rateLimitHeaders(rl),
+    });
+  }
+
   const { data: body, error: jsonError } = await safeJson(request, {
     maxBytes: 16 * 1024,
   });
@@ -46,5 +102,81 @@ async function putIngredients(
     });
   }
 
-  return notImplemented("medications.ingredients.put");
+  const check = canonicalComposition(parsed.data.ingredients);
+  if (!check.ok) {
+    if (check.kind === "unknownNutrient") {
+      return apiError("Unknown nutrient code", 422, {
+        errorCode: "medications.ingredients.invalid",
+        index: check.index,
+      });
+    }
+    return apiError("This unit is not offered for the nutrient", 422, {
+      errorCode: "medications.ingredients.unitMismatch",
+      index: check.index,
+      allowedUnits: check.allowedUnits,
+    });
+  }
+
+  const source = parsed.data.source;
+  const stored = await prisma.$transaction(async (tx) => {
+    await tx.medicationIngredient.deleteMany({
+      where: { medicationId: id, userId: user.id },
+    });
+    if (check.ingredients.length > 0) {
+      await tx.medicationIngredient.createMany({
+        data: check.ingredients.map((ingredient) => ({
+          userId: user.id,
+          medicationId: id,
+          nutrient: ingredient.nutrient,
+          amountPerUnit: ingredient.amountPerUnit,
+          unit: ingredient.unit,
+          enteredAmount: ingredient.enteredAmount,
+          enteredUnit: ingredient.enteredUnit,
+          source,
+        })),
+      });
+    }
+    return tx.medicationIngredient.findMany({
+      where: { medicationId: id, userId: user.id },
+      select: INGREDIENT_SELECT,
+    });
+  });
+
+  await auditLog("medication.ingredients.update", {
+    userId: user.id,
+    ipAddress: getClientIp(request),
+    // C4 — the composition this replaced, as one comparable line per side.
+    details: {
+      medicationId: id,
+      source,
+      count: stored.length,
+      ...overwriteDetails({
+        before: { composition: compositionSummary(medication.ingredients) },
+        after: { composition: compositionSummary(stored) },
+      }),
+    },
+  });
+
+  // Every taken dose of this medication, back to the first, counts with the
+  // new composition: the account's whole SUPPLEMENT history is recomputed.
+  const recompute = await enqueueSupplementNutrientRecompute(user.id);
+  invalidateUserMedications(user.id, { evict: true });
+
+  annotate({
+    action: {
+      name: "medication.ingredients.update",
+      entity_type: "medication",
+      entity_id: id,
+    },
+    meta: {
+      count: stored.length,
+      source,
+      recompute_queued: recompute.queued,
+    },
+  });
+
+  return apiSuccess({
+    ingredients: toIngredientDtos(stored, actor.locale ?? user.locale ?? null),
+    recompute,
+  });
 }
diff --git a/src/app/api/medications/[id]/intake/purge/route.ts b/src/app/api/medications/[id]/intake/purge/route.ts
index da2e249ec..4f9e4b87b 100644
--- a/src/app/api/medications/[id]/intake/purge/route.ts
+++ b/src/app/api/medications/[id]/intake/purge/route.ts
@@ -1,4 +1,8 @@
 import { prisma } from "@/lib/db";
+import {
+  enqueueSupplementNutrientRecompute,
+  medicationHasComposition,
+} from "@/lib/medications/ingredients/recompute-job";
 import { apiHandler, requireRecordAuth } from "@/lib/api-handler";
 import { annotate } from "@/lib/logging/context";
 import { auditLog } from "@/lib/auth/audit";
@@ -63,6 +67,11 @@ export const DELETE = apiHandler(
       where: { medicationId: id, userId: user.id },
     });
 
+    // v1.43 — the purged doses no longer count toward the micronutrients.
+    if (await medicationHasComposition(user.id, id)) {
+      await enqueueSupplementNutrientRecompute(user.id);
+    }
+
     await auditLog("medication.intake.purge", {
       userId: user.id,
       ipAddress: getClientIp(request),
diff --git a/src/app/api/medications/[id]/route.ts b/src/app/api/medications/[id]/route.ts
index 212716afe..535d2f844 100644
--- a/src/app/api/medications/[id]/route.ts
+++ b/src/app/api/medications/[id]/route.ts
@@ -1,6 +1,11 @@
 import { prisma } from "@/lib/db";
 import { sendsMedicationReminders } from "@/lib/medications/auto-mark-taken";
 import { apiHandler, requireAuth, requireRecordAuth } from "@/lib/api-handler";
+import { toIngredientDtos } from "@/lib/medications/ingredients/composition";
+import {
+  enqueueSupplementNutrientRecompute,
+  medicationHasComposition,
+} from "@/lib/medications/ingredients/recompute-job";
 import { annotate } from "@/lib/logging/context";
 import { auditLog } from "@/lib/auth/audit";
 import { overwriteDetails } from "@/lib/sharing/audit-details";
@@ -260,6 +265,18 @@ export const GET = apiHandler(
             Number(medication.unitsPerDose),
           );
 
+    // v1.43 — the composition per unit, labelled in the account language.
+    const ingredientRows = await prisma.medicationIngredient.findMany({
+      where: { medicationId: id, userId: user.id },
+      select: {
+        nutrient: true,
+        amountPerUnit: true,
+        unit: true,
+        enteredAmount: true,
+        enteredUnit: true,
+      },
+    });
+
     // v1.40 (#1024) — the courses, resolved on the server.
     const courseFields = (
       await resolveCourseFields(
@@ -294,6 +311,7 @@ export const GET = apiHandler(
       stockUnitsRemaining,
       stockDosesRemaining,
       runwayDays,
+      ingredients: toIngredientDtos(ingredientRows, user.locale ?? null),
     });
   },
 );
@@ -1122,6 +1140,13 @@ export const PUT = apiHandler(
     const resolvedCategory = (await resolveMedicationCategories([id]))[id];
     const normalizedCategory = resolvedCategory?.category ?? "OTHER";
 
+    // v1.43 — a changed units-per-dose (on the medication or on a slot)
+    // changes what every taken dose added, so a medication with a composition
+    // has its doses recomputed. Cheap and coalesced when nothing moved.
+    if (await medicationHasComposition(user.id, id)) {
+      await enqueueSupplementNutrientRecompute(user.id);
+    }
+
     await auditLog("medication.update", {
       userId: user.id,
       ipAddress: getClientIp(request),
@@ -1225,6 +1250,10 @@ export const DELETE = apiHandler(
       data: { revoked: true },
     });
 
+    // v1.43 — whether its doses counted toward the micronutrients, read
+    // before the delete cascades the composition away.
+    const hadComposition = await medicationHasComposition(user.id, id);
+
     await deleteMedicationCategory(id);
     await prisma.medication.delete({ where: { id } });
 
@@ -1246,6 +1275,9 @@ export const DELETE = apiHandler(
     // caches so the next read reflects the deletion.
     invalidateUserMedications(user.id, { evict: true });
 
+    // Its doses are gone with it, so the days they counted on are recomputed.
+    if (hadComposition) await enqueueSupplementNutrientRecompute(user.id);
+
     return apiSuccess({ deleted: true });
   },
 );
diff --git a/src/app/api/nutrients/catalog/route.ts b/src/app/api/nutrients/catalog/route.ts
index fa47186ec..3f63755c5 100644
--- a/src/app/api/nutrients/catalog/route.ts
+++ b/src/app/api/nutrients/catalog/route.ts
@@ -8,8 +8,11 @@
  * and never convert units themselves.
  */
 import { apiHandler, requireRecordAuth } from "@/lib/api-handler";
-import { notImplemented } from "@/lib/http/not-implemented";
+import { apiSuccess } from "@/lib/api-response";
+import { annotate } from "@/lib/logging/context";
+import { nutrientLabel } from "@/lib/medications/ingredients/composition";
 import { requireModuleEnabled } from "@/lib/modules/gate";
+import { NUTRIENT_DEFINITIONS } from "@/lib/nutrients/catalog";
 
 export const dynamic = "force-dynamic";
 
@@ -18,5 +21,22 @@ export const GET = apiHandler(async () => {
   const gate = await requireModuleEnabled(user.id, "nutrients");
   if (!gate.enabled) return gate.response;
 
-  return notImplemented("nutrients.catalog.get");
+  const entries = NUTRIENT_DEFINITIONS.map((def) => ({
+    code: def.code,
+    unit: def.unit,
+    labelKey: def.labelKey,
+    label: nutrientLabel(def.code, user.locale ?? null),
+    syncable: def.syncable,
+    inputUnits: def.inputUnits.map((u) => ({
+      unit: u.unit,
+      factorToCanonical: u.factorToCanonical,
+    })),
+    upperLimit: def.upperLimit,
+  }));
+
+  annotate({
+    action: { name: "nutrient.catalog.read" },
+    meta: { entry_count: entries.length },
+  });
+  return apiSuccess({ entries });
 });
diff --git a/src/app/api/nutrients/daily/route.ts b/src/app/api/nutrients/daily/route.ts
index 69758e324..faf15b4a1 100644
--- a/src/app/api/nutrients/daily/route.ts
+++ b/src/app/api/nutrients/daily/route.ts
@@ -18,7 +18,6 @@
  */
 import { NextRequest } from "next/server";
 
-import { prisma } from "@/lib/db";
 import { apiHandler, requireRecordAuth } from "@/lib/api-handler";
 import { apiSuccess, returnAllZodIssues } from "@/lib/api-response";
 import { annotate } from "@/lib/logging/context";
@@ -29,7 +28,8 @@ import {
   resolveNutrientReference,
 } from "@/lib/nutrients/catalog";
 import { nutrientDailyQuerySchema } from "@/lib/validations/nutrients";
-import { DEFAULT_TIMEZONE, shiftDateKey, userDayKey } from "@/lib/tz/format";
+import { readNutrientDaily } from "@/lib/nutrients/read";
+import { DEFAULT_TIMEZONE } from "@/lib/tz/format";
 
 export const dynamic = "force-dynamic";
 
@@ -51,34 +51,23 @@ export const GET = apiHandler(async (request: NextRequest) => {
   const { nutrient, days } = parsed.data;
   const definition = NUTRIENT_CATALOG[nutrient];
 
+  // Summed across sources within a day, split by source and judged against
+  // the upper intake level in `readNutrientDaily` (v1.43), the same read the
+  // overview and the MCP tool use.
   const userTz = user.timezone || DEFAULT_TIMEZONE;
-  const todayKey = userDayKey(new Date(), userTz);
-  const sinceKey = shiftDateKey(todayKey, -(days - 1));
-
-  const rows = await prisma.nutrientIntakeDay.findMany({
-    where: { userId: user.id, nutrient, day: { gte: sinceKey } },
-    select: { day: true, amount: true },
-  });
-
-  // Sum across sources within a day BEFORE bucketing — the same fold
-  // `GET /api/nutrients` applies (migration 0249 note there).
-  const sumByDay = new Map<string, number>();
-  for (const row of rows) {
-    sumByDay.set(row.day, (sumByDay.get(row.day) ?? 0) + row.amount);
-  }
-
-  const daySeries: Array<{ day: string; amount: number }> = [];
-  for (let i = 0; i < days; i++) {
-    const key = shiftDateKey(sinceKey, i);
-    daySeries.push({ day: key, amount: sumByDay.get(key) ?? 0 });
-  }
+  const { days: daySeries, rowCount } = await readNutrientDaily(
+    user.id,
+    userTz,
+    nutrient,
+    days,
+  );
 
   const sex = binaryReferenceSex(user.gender);
   const reference = resolveNutrientReference(nutrient, sex);
 
   annotate({
     action: { name: "nutrient.daily.read" },
-    meta: { nutrient, window_days: days, row_count: rows.length },
+    meta: { nutrient, window_days: days, row_count: rowCount },
   });
 
   return apiSuccess({
@@ -87,5 +76,6 @@ export const GET = apiHandler(async (request: NextRequest) => {
     windowDays: days,
     days: daySeries,
     reference,
+    upperLimit: definition.upperLimit,
   });
 });
diff --git a/src/app/api/nutrients/route.ts b/src/app/api/nutrients/route.ts
index 73d459334..c90ea487e 100644
--- a/src/app/api/nutrients/route.ts
+++ b/src/app/api/nutrients/route.ts
@@ -21,9 +21,9 @@ import { apiHandler, requireRecordAuth } from "@/lib/api-handler";
 import { apiSuccess, returnAllZodIssues } from "@/lib/api-response";
 import { annotate } from "@/lib/logging/context";
 import { requireModuleEnabled } from "@/lib/modules/gate";
-import { NUTRIENT_CODES, isNutrientCode } from "@/lib/nutrients/catalog";
+import { readNutrientOverview } from "@/lib/nutrients/read";
 import { nutrientOverviewQuerySchema } from "@/lib/validations/nutrients";
-import { DEFAULT_TIMEZONE, shiftDateKey, userDayKey } from "@/lib/tz/format";
+import { DEFAULT_TIMEZONE } from "@/lib/tz/format";
 
 export const dynamic = "force-dynamic";
 
@@ -109,72 +109,16 @@ export const GET = apiHandler(async (request: NextRequest) => {
 
   // v1.30 (DATAINT L4) — window floor anchored on the caller's own local
   // "today" (`User.timezone`), mirroring the sibling `GET
-  // /api/nutrients/daily` route. The stored `day` is a local-timezone key,
-  // so a UTC floor was off by up to a calendar day at the window edge for
-  // any non-UTC user.
+  // /api/nutrients/daily` route. v1.43 — the fold (sum across sources, one
+  // day counted once however many source rows it has) lives in
+  // `readNutrientOverview`, which also keeps the latest day's split by source
+  // and judges it against the upper intake level.
   const userTz = user.timezone || DEFAULT_TIMEZONE;
-  const todayKey = userDayKey(new Date(), userTz);
-  const since = shiftDateKey(todayKey, -(days - 1));
-
-  const rows = await prisma.nutrientIntakeDay.findMany({
-    where: { userId: user.id, day: { gte: since } },
-    orderBy: [{ nutrient: "asc" }, { day: "desc" }],
-    select: { nutrient: true, unit: true, day: true, amount: true },
-  });
-
-  // v1.29 — `source` joined the PK (migration 0249): a day can now carry
-  // an APPLE_HEALTH row AND a MANUAL row. Rows arrive day-DESC inside each
-  // nutrient, so the first DAY seen per code is the latest; a second row
-  // for that same day (the other source) adds to the running total instead
-  // of opening a new "day".
-  //
-  // v1.30 (DATAINT M3) — `daysWithData` used to increment on every row
-  // whose `day` differed from the PINNED `latestDay` field, so a second
-  // source's row on an already-counted OLDER day (e.g. water logged via
-  // both APPLE_HEALTH and MANUAL on the same non-latest day) opened a
-  // second "day" for that same calendar date. `daysSeen` is a per-nutrient
-  // set of distinct day keys — every row adds to it, so a repeated day
-  // (any number of source rows) is counted exactly once.
-  const byCode = new Map<
-    string,
-    {
-      unit: string;
-      latestDay: string;
-      latestAmount: number;
-      daysSeen: Set<string>;
-    }
-  >();
-  for (const row of rows) {
-    const existing = byCode.get(row.nutrient);
-    if (!existing) {
-      byCode.set(row.nutrient, {
-        unit: row.unit,
-        latestDay: row.day,
-        latestAmount: row.amount,
-        daysSeen: new Set([row.day]),
-      });
-      continue;
-    }
-    existing.daysSeen.add(row.day);
-    if (row.day === existing.latestDay) {
-      existing.latestAmount += row.amount;
-    }
-  }
-
-  // Catalog order; a stored code that ever fell out of the catalog is
-  // dropped from the card rather than crashing the label lookup.
-  const nutrients = NUTRIENT_CODES.filter(
-    (code) => isNutrientCode(code) && byCode.has(code),
-  ).map((code) => {
-    const summary = byCode.get(code)!;
-    return {
-      nutrient: code,
-      unit: summary.unit,
-      latestDay: summary.latestDay,
-      latestAmount: summary.latestAmount,
-      daysWithData: summary.daysSeen.size,
-    };
-  });
+  const { nutrients, rowCount } = await readNutrientOverview(
+    user.id,
+    userTz,
+    days,
+  );
 
   // The account holder's only signal that a sync ever arrived is this
   // lookup — the read path stays honest instead of a bare "no data yet"
@@ -226,7 +170,7 @@ export const GET = apiHandler(async (request: NextRequest) => {
     meta: {
       window_days: days,
       nutrient_count: nutrients.length,
-      row_count: rows.length,
+      row_count: rowCount,
     },
   });
 
diff --git a/src/lib/jobs/medication-intake-import.ts b/src/lib/jobs/medication-intake-import.ts
index a79a71ed4..16e1d80fc 100644
--- a/src/lib/jobs/medication-intake-import.ts
+++ b/src/lib/jobs/medication-intake-import.ts
@@ -6,6 +6,7 @@ import { auditLog } from "@/lib/auth/audit";
 import { prisma, toJson } from "@/lib/db";
 import { jobDone, jobFailed, type JobOutcome } from "@/lib/jobs/job-outcome";
 import { jobBudget } from "@/lib/jobs/job-budget";
+import { enqueueSupplementNutrientRecompute } from "@/lib/medications/ingredients/recompute-job";
 import { consumeImportedIntakesBatch } from "@/lib/medications/inventory/consumption";
 import { queueMedicationIntakeSync } from "@/lib/notifications/medication-intake-sync";
 import {
@@ -849,6 +850,10 @@ async function workMedicationIntakeImport(
       if (outcome.result.imported > 0) {
         invalidateUserMedications(outcome.userId, { evict: true });
         queueMedicationIntakeSync({ userId: outcome.userId });
+        // v1.43 — the chunks recomputed their compliance days inside their
+        // own transactions; the supplement nutrient rows follow once, now
+        // that every imported dose is committed.
+        await enqueueSupplementNutrientRecompute(outcome.userId);
       }
       return outcome.result;
     }
diff --git a/src/lib/jobs/queue-runtime.ts b/src/lib/jobs/queue-runtime.ts
index 4efb8728d..319df60e9 100644
--- a/src/lib/jobs/queue-runtime.ts
+++ b/src/lib/jobs/queue-runtime.ts
@@ -214,6 +214,9 @@ export const QUEUE_RUNTIME: Readonly<Record<string, QueueRuntime>> = {
   "step-consolidation-repair": short(
     "One account's tombstoned step rows inside the retention window.",
   ),
+  "supplement-nutrient-recompute": short(
+    "One account's taken doses of medications with a composition: a few thousand rows for years of a daily supplement.",
+  ),
   "cumulative-pr-rederive": short(
     "One account's record detection; measured at 20 seconds for 1.25 million rows.",
   ),
diff --git a/src/lib/jobs/reminder/register-rollup.ts b/src/lib/jobs/reminder/register-rollup.ts
index ef38e1ddd..41609001e 100644
--- a/src/lib/jobs/reminder/register-rollup.ts
+++ b/src/lib/jobs/reminder/register-rollup.ts
@@ -45,6 +45,12 @@ import {
   enqueueBootTimeMedicationComplianceBackfill,
   type MedicationComplianceBackfillPayload,
 } from "@/lib/rollups/medication-compliance-rollups";
+import {
+  SUPPLEMENT_NUTRIENT_RECOMPUTE_QUEUE,
+  SUPPLEMENT_NUTRIENT_RECOMPUTE_CONCURRENCY,
+  runSupplementNutrientRecompute,
+  type SupplementNutrientRecomputePayload,
+} from "@/lib/medications/ingredients/recompute-job";
 import {
   drainPerSampleCumulative,
   DRAIN_CUMULATIVE_CUTOFF_HOURS,
@@ -177,6 +183,9 @@ const allQueues = [
   // drain schedule silently no-ops and the per-sample APPLE_HEALTH rows
   // never collapse.
   DRAIN_CUMULATIVE_QUEUE,
+  // v1.43 — one account's supplement doses recomputed into the day's
+  // micronutrients after a change that spans more than one day.
+  SUPPLEMENT_NUTRIENT_RECOMPUTE_QUEUE,
 ];
 
 const schedules: ScheduleEntry[] = [
@@ -214,6 +223,11 @@ const queuePolicies: QueuePolicyTable = {
     reason:
       "Same shape as the measurement recompute: re-reads the bucket at run time, so only queued duplicates may be collapsed.",
   },
+  [SUPPLEMENT_NUTRIENT_RECOMPUTE_QUEUE]: {
+    policy: "short",
+    reason:
+      "Per-account recompute of supplement nutrient rows; the pass reads the live doses and composition when it starts, so a queued duplicate may be collapsed, while a send during a running pass must still queue the next one.",
+  },
 
   // The rest are per-user, self-converging boot/discovery backfills. A second
   // concurrent run is pure duplicated work, and the discovery predicate
@@ -406,6 +420,21 @@ export async function registerRollupQueues(
     },
   );
 
+  // v1.43 — supplement nutrient recompute. One account per job, serial.
+  await createAndWork<SupplementNutrientRecomputePayload>(
+    boss,
+    SUPPLEMENT_NUTRIENT_RECOMPUTE_QUEUE,
+    { localConcurrency: SUPPLEMENT_NUTRIENT_RECOMPUTE_CONCURRENCY },
+    async (jobs) => {
+      let rowsWritten = 0;
+      for (const job of jobs) {
+        const result = await runSupplementNutrientRecompute(job.data);
+        rowsWritten += result.rowsWritten;
+      }
+      return jobDone({ users: jobs.length, rows_written: rowsWritten });
+    },
+  );
+
   // v1.30.3 — cumulative-PersonalRecord rederivation worker (QA F4). The
   // boot enqueue helper below sends one job per user still holding a
   // suspect pre-fix inflated cumulative-type record; this handler deletes
diff --git a/src/lib/jobs/subsystem-surface.ts b/src/lib/jobs/subsystem-surface.ts
index c4f51546c..ed4dfa171 100644
--- a/src/lib/jobs/subsystem-surface.ts
+++ b/src/lib/jobs/subsystem-surface.ts
@@ -82,6 +82,7 @@ const subsystemSurface = {
   "step-consolidation": { audience: "system" },
   "step-consolidation-repair": { audience: "system" },
   "cumulative-pr-rederive": { audience: "system" },
+  "supplement-nutrient-recompute": { audience: "system" },
   "mean-consolidation": { audience: "system" },
   "dense-intraday-retention": { audience: "system" },
   "dense-intraday-hourly-rebuild": { audience: "system" },
diff --git a/src/lib/mcp/nutrients-read.ts b/src/lib/mcp/nutrients-read.ts
index 1696fd5a6..9b9cd33d2 100644
--- a/src/lib/mcp/nutrients-read.ts
+++ b/src/lib/mcp/nutrients-read.ts
@@ -27,15 +27,22 @@ import {
   isNutrientCode,
   resolveNutrientReference,
   type NutrientCode,
+  type NutrientUpperLimit,
   type ResolvedNutrientReference,
 } from "@/lib/nutrients/catalog";
+import {
+  readNutrientDaily,
+  readNutrientOverview,
+  type NutrientAmountBySource,
+  type NutrientDailyEntry,
+} from "@/lib/nutrients/read";
 import { defaultLocale } from "@/lib/i18n/config";
 import {
   buildLocalisedLabelIndex,
   foldLabel,
   labelIn,
 } from "@/lib/i18n/localised-label-index";
-import { DEFAULT_TIMEZONE, shiftDateKey, userDayKey } from "@/lib/tz/format";
+import { DEFAULT_TIMEZONE } from "@/lib/tz/format";
 
 /** The i18n key the app already labels a nutrient with, in every bundle. */
 function nutrientLabelKey(code: NutrientCode): string {
@@ -104,6 +111,9 @@ export interface NutrientsOverviewResult {
     latestDay: string;
     latestAmount: number;
     daysWithData: number;
+    latestBySource: NutrientAmountBySource;
+    upperLimit: NutrientUpperLimit | null;
+    latestAboveUpperLimit: boolean | null;
   }>;
 }
 
@@ -114,8 +124,9 @@ export interface NutrientsDailyResult {
   label?: string;
   unit?: string;
   windowDays?: number;
-  days?: Array<{ day: string; amount: number }>;
+  days?: NutrientDailyEntry[];
   reference?: ResolvedNutrientReference | null;
+  upperLimit?: NutrientUpperLimit | null;
 }
 
 /**
@@ -140,67 +151,27 @@ export function resolveNutrientCode(input: string): NutrientCode | null {
   return NUTRIENT_NAME_INDEX.index.get(foldLabel(raw)) ?? null;
 }
 
-/** Presence overview across every logged code — mirrors `GET /api/nutrients`. */
+/**
+ * Presence overview across every logged code — the same read as
+ * `GET /api/nutrients` (`readNutrientOverview`), labels added.
+ */
 async function readOverview(
   userId: string,
   userTz: string,
   days: number,
 ): Promise<NutrientsOverviewResult> {
-  const todayKey = userDayKey(new Date(), userTz);
-  const since = shiftDateKey(todayKey, -(days - 1));
-
-  const rows = await prisma.nutrientIntakeDay.findMany({
-    where: { userId, day: { gte: since } },
-    orderBy: [{ nutrient: "asc" }, { day: "desc" }],
-    select: { nutrient: true, unit: true, day: true, amount: true },
-  });
-
-  // v1.29 — `source` joined the PK (migration 0249): a day can carry an
-  // APPLE_HEALTH row AND a MANUAL row. Rows arrive day-DESC inside each
-  // nutrient, so the first day seen per code is the latest; a second row for
-  // that same day (the other source) adds to the running total. `daysSeen` is
-  // a per-nutrient SET of distinct day keys so a repeated day (any number of
-  // source rows) counts exactly once — the same fold `GET /api/nutrients`
-  // applies (see that route's docblock).
-  const byCode = new Map<
-    string,
-    {
-      unit: string;
-      latestDay: string;
-      latestAmount: number;
-      daysSeen: Set<string>;
-    }
-  >();
-  for (const row of rows) {
-    const existing = byCode.get(row.nutrient);
-    if (!existing) {
-      byCode.set(row.nutrient, {
-        unit: row.unit,
-        latestDay: row.day,
-        latestAmount: row.amount,
-        daysSeen: new Set([row.day]),
-      });
-      continue;
-    }
-    existing.daysSeen.add(row.day);
-    if (row.day === existing.latestDay) {
-      existing.latestAmount += row.amount;
-    }
-  }
-
-  const nutrients = NUTRIENT_CODES.filter(
-    (code) => isNutrientCode(code) && byCode.has(code),
-  ).map((code) => {
-    const summary = byCode.get(code)!;
-    return {
-      nutrient: code,
-      label: NUTRIENT_LABELS[code],
-      unit: summary.unit,
-      latestDay: summary.latestDay,
-      latestAmount: summary.latestAmount,
-      daysWithData: summary.daysSeen.size,
-    };
-  });
+  const { nutrients: rows } = await readNutrientOverview(userId, userTz, days);
+  const nutrients = rows.map((row) => ({
+    nutrient: row.nutrient,
+    label: NUTRIENT_LABELS[row.nutrient],
+    unit: row.unit,
+    latestDay: row.latestDay,
+    latestAmount: row.latestAmount,
+    daysWithData: row.daysWithData,
+    latestBySource: row.latestBySource,
+    upperLimit: row.upperLimit,
+    latestAboveUpperLimit: row.latestAboveUpperLimit,
+  }));
 
   return {
     present: nutrients.length > 0,
@@ -210,7 +181,10 @@ async function readOverview(
   };
 }
 
-/** One nutrient's per-day series + reference — mirrors `GET /api/nutrients/daily`. */
+/**
+ * One nutrient's per-day series + reference — the same read as
+ * `GET /api/nutrients/daily` (`readNutrientDaily`).
+ */
 async function readDaily(
   userId: string,
   userTz: string,
@@ -219,38 +193,24 @@ async function readDaily(
   days: number,
 ): Promise<NutrientsDailyResult> {
   const definition = NUTRIENT_CATALOG[nutrient];
-  const todayKey = userDayKey(new Date(), userTz);
-  const sinceKey = shiftDateKey(todayKey, -(days - 1));
-
-  const rows = await prisma.nutrientIntakeDay.findMany({
-    where: { userId, nutrient, day: { gte: sinceKey } },
-    select: { day: true, amount: true },
-  });
-
-  // Sum across sources within a day BEFORE bucketing — the same fold `GET
-  // /api/nutrients/daily` applies.
-  const sumByDay = new Map<string, number>();
-  for (const row of rows) {
-    sumByDay.set(row.day, (sumByDay.get(row.day) ?? 0) + row.amount);
-  }
-
-  const daySeries: Array<{ day: string; amount: number }> = [];
-  for (let i = 0; i < days; i++) {
-    const key = shiftDateKey(sinceKey, i);
-    daySeries.push({ day: key, amount: sumByDay.get(key) ?? 0 });
-  }
-
+  const { days: daySeries, rowCount } = await readNutrientDaily(
+    userId,
+    userTz,
+    nutrient,
+    days,
+  );
   const reference = resolveNutrientReference(nutrient, sex);
 
   return {
-    present: rows.length > 0,
-    ...(rows.length === 0 ? { reason: "no_data" } : {}),
+    present: rowCount > 0,
+    ...(rowCount === 0 ? { reason: "no_data" } : {}),
     nutrient,
     label: NUTRIENT_LABELS[nutrient],
     unit: definition.unit,
     windowDays: days,
     days: daySeries,
     reference,
+    upperLimit: definition.upperLimit,
   };
 }
 
diff --git a/src/lib/mcp/tools.ts b/src/lib/mcp/tools.ts
index d00699618..ac1723bb7 100644
--- a/src/lib/mcp/tools.ts
+++ b/src/lib/mcp/tools.ts
@@ -401,6 +401,15 @@ function plainNutrientText(
       ref.direction === "upperGuidance" ? "guidance ceiling" : "target";
     parts.push(`EFSA ${verb} ${round1(ref.value)}${unit}`);
   }
+  // v1.43 — the upper-limit verdict is the server's, read off the day.
+  const limit = result.upperLimit;
+  if (limit && latestDay?.aboveUpperLimit) {
+    const share =
+      limit.scope === "supplemental" ? " for the supplement share" : "";
+    parts.push(
+      `that day is above the EFSA upper intake level of ${round1(limit.value)}${unit}${share}`,
+    );
+  }
   return parts.length > 0
     ? `${label}: ${parts.join(", ")}.`
     : `${label}: data is on file for the recent window.`;
diff --git a/src/lib/medications/ingredients/composition.ts b/src/lib/medications/ingredients/composition.ts
new file mode 100644
index 000000000..1b8b3da8f
--- /dev/null
+++ b/src/lib/medications/ingredients/composition.ts
@@ -0,0 +1,150 @@
+/**
+ * v1.43 — a supplement's composition per unit (tablet, capsule): checking
+ * what was entered against the nutrient catalogue, storing it canonically,
+ * and publishing it.
+ *
+ * Every amount is stored in the catalogue's canonical unit for its code. An
+ * amount entered in another input unit (vitamin D in IU) is converted through
+ * the catalogue and the entered amount and unit are kept beside it, so the
+ * form shows the person what they typed. The catalogue is the only place a
+ * unit or a factor is spelled; nothing here names one.
+ */
+import { coerceLocale } from "@/lib/i18n/config";
+import { labelIn } from "@/lib/i18n/localised-label-index";
+import {
+  NUTRIENT_CATALOG,
+  catalogEntryFor,
+  isCanonicalNutrientUnit,
+  isNutrientCode,
+  toCanonicalNutrientAmount,
+  type NutrientCode,
+} from "@/lib/nutrients/catalog";
+
+/** One ingredient as the PUT body carries it. */
+export interface IngredientInput {
+  nutrient: string;
+  amount: number;
+  unit: string;
+}
+
+/** One ingredient as it is stored. */
+export interface CanonicalIngredient {
+  nutrient: NutrientCode;
+  amountPerUnit: number;
+  unit: string;
+  enteredAmount: number | null;
+  enteredUnit: string | null;
+}
+
+export type CompositionCheck =
+  | { ok: true; ingredients: CanonicalIngredient[] }
+  | { ok: false; kind: "unknownNutrient"; index: number }
+  | {
+      ok: false;
+      kind: "unitMismatch";
+      index: number;
+      allowedUnits: string[];
+    };
+
+/**
+ * Check each entry against the catalogue and convert it to the canonical
+ * unit. The first entry that fails decides the answer, with its index, so
+ * the form can point at the row.
+ */
+export function canonicalComposition(
+  inputs: ReadonlyArray<IngredientInput>,
+): CompositionCheck {
+  const ingredients: CanonicalIngredient[] = [];
+  for (const [index, input] of inputs.entries()) {
+    if (!isNutrientCode(input.nutrient)) {
+      return { ok: false, kind: "unknownNutrient", index };
+    }
+    const code = input.nutrient;
+    const canonical = toCanonicalNutrientAmount(code, input.amount, input.unit);
+    if (canonical === null || !(canonical > 0)) {
+      return {
+        ok: false,
+        kind: "unitMismatch",
+        index,
+        allowedUnits: NUTRIENT_CATALOG[code].inputUnits.map((u) => u.unit),
+      };
+    }
+    const converted = !isCanonicalNutrientUnit(code, input.unit);
+    ingredients.push({
+      nutrient: code,
+      amountPerUnit: canonical,
+      unit: NUTRIENT_CATALOG[code].unit,
+      enteredAmount: converted ? input.amount : null,
+      enteredUnit: converted ? input.unit : null,
+    });
+  }
+  return { ok: true, ingredients };
+}
+
+/** One ingredient on the wire (`MedicationIngredient`). */
+export interface MedicationIngredientDto {
+  nutrient: string;
+  amountPerUnit: number;
+  unit: string;
+  enteredAmount: number | null;
+  enteredUnit: string | null;
+  labelKey: string;
+  label: string;
+}
+
+/** The nutrient's name in `locale`, falling back to the code itself. */
+export function nutrientLabel(code: string, locale: string | null): string {
+  const entry = catalogEntryFor(code);
+  if (!entry) return code;
+  return labelIn(coerceLocale(locale), entry.labelKey) ?? code;
+}
+
+/**
+ * Publish stored rows in catalogue order, each labelled in the account's
+ * language. A stored code the catalogue no longer knows still travels, under
+ * its raw code, rather than vanishing from the person's medication.
+ */
+export function toIngredientDtos(
+  rows: ReadonlyArray<{
+    nutrient: string;
+    amountPerUnit: number;
+    unit: string;
+    enteredAmount: number | null;
+    enteredUnit: string | null;
+  }>,
+  locale: string | null,
+): MedicationIngredientDto[] {
+  const order = (code: string) => {
+    const entry = catalogEntryFor(code);
+    return entry ? entry.order : Number.MAX_SAFE_INTEGER;
+  };
+  return [...rows]
+    .sort((a, b) => order(a.nutrient) - order(b.nutrient))
+    .map((row) => ({
+      nutrient: row.nutrient,
+      amountPerUnit: row.amountPerUnit,
+      unit: row.unit,
+      enteredAmount: row.enteredAmount,
+      enteredUnit: row.enteredUnit,
+      labelKey: catalogEntryFor(row.nutrient)?.labelKey ?? row.nutrient,
+      label: nutrientLabel(row.nutrient, locale),
+    }));
+}
+
+/**
+ * One comparable line for a composition (`dha=250 mg; vitamin_d=25 ug`), for
+ * the audit row's before and after. Codes sorted, so an unchanged set reads
+ * as unchanged; the empty set is the empty string.
+ */
+export function compositionSummary(
+  rows: ReadonlyArray<{
+    nutrient: string;
+    amountPerUnit: number;
+    unit: string;
+  }>,
+): string {
+  return [...rows]
+    .sort((a, b) => a.nutrient.localeCompare(b.nutrient))
+    .map((row) => `${row.nutrient}=${row.amountPerUnit} ${row.unit}`)
+    .join("; ");
+}
diff --git a/src/lib/medications/ingredients/recompute-job.ts b/src/lib/medications/ingredients/recompute-job.ts
new file mode 100644
index 000000000..9e08a2d57
--- /dev/null
+++ b/src/lib/medications/ingredients/recompute-job.ts
@@ -0,0 +1,87 @@
+/**
+ * v1.43 — the `supplement-nutrient-recompute` queue: one account's whole
+ * SUPPLEMENT history, recomputed after something that touches more than one
+ * day changed (a composition saved, a medication deleted, its doses purged,
+ * an import landed).
+ *
+ * The queue carries the `short` policy with a per-account `singletonKey`, the
+ * shape the rollup recompute uses: sends that pile up while a pass is still
+ * QUEUED collapse into it, which is safe because the handler reads the
+ * account's live rows when it starts. A send issued while a pass is already
+ * RUNNING queues a second one, so a change that lands mid-pass is never
+ * stranded. The pass itself takes a per-account advisory lock.
+ *
+ * The queue MUST be registered in the rollup registrar
+ * (`src/lib/jobs/reminder/register-rollup.ts`) so pg-boss provisions it.
+ */
+import { prisma } from "@/lib/db";
+import { getGlobalBoss } from "@/lib/jobs/boss-instance";
+import { annotate } from "@/lib/logging/context";
+
+import { recomputeSupplementNutrientsForUser } from "./recompute";
+
+export const SUPPLEMENT_NUTRIENT_RECOMPUTE_QUEUE =
+  "supplement-nutrient-recompute";
+
+/** Serial: a pass is a handful of queries per account. */
+export const SUPPLEMENT_NUTRIENT_RECOMPUTE_CONCURRENCY = 1;
+
+export interface SupplementNutrientRecomputePayload {
+  userId: string;
+  enqueuedAt: string;
+}
+
+/**
+ * Queue the account's full recompute. `queued: true` when the worker has it
+ * (a fresh job, or one already waiting that will read this change). When no
+ * queue is reachable the pass runs inline so the change is never lost, and
+ * the answer is `queued: false`.
+ */
+export async function enqueueSupplementNutrientRecompute(
+  userId: string,
+): Promise<{ queued: boolean }> {
+  const boss = getGlobalBoss();
+  if (boss) {
+    try {
+      const payload: SupplementNutrientRecomputePayload = {
+        userId,
+        enqueuedAt: new Date().toISOString(),
+      };
+      await boss.send(SUPPLEMENT_NUTRIENT_RECOMPUTE_QUEUE, payload, {
+        retryLimit: 3,
+        retryDelay: 30,
+        retryBackoff: true,
+        singletonKey: `supplement-nutrient-recompute|${userId}`,
+      });
+      // A null id means a pass for this account is already queued and will
+      // read this change when it starts.
+      return { queued: true };
+    } catch (err) {
+      annotate({
+        action: { name: "supplement_nutrients.enqueue_failed" },
+        meta: { reason: err instanceof Error ? err.name : "unknown" },
+      });
+    }
+  }
+  await recomputeSupplementNutrientsForUser(userId);
+  return { queued: false };
+}
+
+/** The pg-boss handler body for one job. */
+export async function runSupplementNutrientRecompute(
+  payload: SupplementNutrientRecomputePayload,
+): Promise<{ rowsWritten: number; ran: boolean }> {
+  return recomputeSupplementNutrientsForUser(payload.userId);
+}
+
+/** Whether a medication has a stored composition (its doses add nutrients). */
+export async function medicationHasComposition(
+  userId: string,
+  medicationId: string,
+): Promise<boolean> {
+  const row = await prisma.medicationIngredient.findFirst({
+    where: { userId, medicationId },
+    select: { id: true },
+  });
+  return row !== null;
+}
diff --git a/src/lib/medications/ingredients/recompute.ts b/src/lib/medications/ingredients/recompute.ts
new file mode 100644
index 000000000..720c4b95f
--- /dev/null
+++ b/src/lib/medications/ingredients/recompute.ts
@@ -0,0 +1,309 @@
+/**
+ * v1.43 — supplement doses to micronutrients.
+ *
+ * A medication with a stored composition (`MedicationIngredient`) adds, for
+ * every dose that was taken, `amountPerUnit × unitsPerDose` of each
+ * ingredient to the day's `NutrientIntakeDay` row with `source = SUPPLEMENT`.
+ *
+ * The row is RECOMPUTED, never incremented: each pass reads the taken doses
+ * of a day (or of the whole history), sums them, and replaces the day's
+ * SUPPLEMENT rows with the sum. That is what makes every path idempotent and
+ * self-correcting — a dose marked taken twice, a correction, an undo, a
+ * deleted dose, a changed composition all converge on the same rows the next
+ * pass computes, and a day left with no contribution loses its row.
+ *
+ * Which doses count: live rows (`deletedAt` null) with `takenAt` set that are
+ * neither skipped nor auto-missed; an automatically recorded dose counts.
+ * Rows sharing one `(medication, scheduledFor)` slot (a reminder row and an
+ * API row for the same dose) count once, the way the compliance rollup folds
+ * them. A dose belongs to the local day of its `scheduledFor` in the account's
+ * timezone, the same day the dose list and the compliance rollup put it on.
+ * The units per dose resolve per slot exactly as the inventory consumption
+ * does (`resolveUnitsPerDose`), so a half tablet at noon counts as half.
+ *
+ * Module `nutrients` off: nothing is written and existing rows are left as
+ * they are, like the other sources' rows.
+ */
+import type { Prisma } from "@/generated/prisma/client";
+import { prisma } from "@/lib/db";
+import { annotate } from "@/lib/logging/context";
+import { resolveUnitsPerDose } from "@/lib/medications/inventory/consumption";
+import { isModuleEnabled } from "@/lib/modules/gate";
+import { NUTRIENT_CATALOG, isNutrientCode } from "@/lib/nutrients/catalog";
+import { NUTRIENT_SOURCE } from "@/lib/nutrients/sources";
+import { DEFAULT_TIMEZONE, isValidTimezone, userDayKey } from "@/lib/tz/format";
+import { localDayWindow } from "@/lib/tz/local-day";
+
+type Tx = Prisma.TransactionClient;
+
+/** One supplement nutrient row as the pass writes it. */
+export interface SupplementNutrientRow {
+  day: string;
+  nutrient: string;
+  amount: number;
+  unit: string;
+}
+
+/** A taken dose slot of a medication that has a composition. */
+export interface TakenSupplementSlot {
+  medicationId: string;
+  scheduledFor: Date;
+}
+
+/** What the pass needs to know about each medication with a composition. */
+export interface SupplementMedication {
+  id: string;
+  unitsPerDose: Prisma.Decimal;
+  schedules: ReadonlyArray<{
+    timesOfDay: string[];
+    windowStart: string;
+    unitsPerDose: Prisma.Decimal | null;
+  }>;
+  ingredients: ReadonlyArray<{
+    nutrient: string;
+    amountPerUnit: number;
+  }>;
+}
+
+function safeTimezone(tz: string | null | undefined): string {
+  return tz && isValidTimezone(tz) ? tz : DEFAULT_TIMEZONE;
+}
+
+/** Round away binary noise from the sums (25 × 2 stays 50). */
+function round(value: number): number {
+  return Math.round(value * 1e6) / 1e6;
+}
+
+/**
+ * Sum taken slots into day rows. Pure. Duplicate rows of one slot count once;
+ * an ingredient whose code fell out of the catalogue is skipped rather than
+ * written under a unit nobody can vouch for.
+ */
+export function supplementNutrientRows(
+  slots: ReadonlyArray<TakenSupplementSlot>,
+  medications: ReadonlyArray<SupplementMedication>,
+  timezone: string,
+): SupplementNutrientRow[] {
+  const byId = new Map(medications.map((m) => [m.id, m]));
+  const seen = new Set<string>();
+  const sums = new Map<string, SupplementNutrientRow>();
+
+  for (const slot of slots) {
+    const slotKey = `${slot.medicationId}|${slot.scheduledFor.getTime()}`;
+    if (seen.has(slotKey)) continue;
+    seen.add(slotKey);
+    const medication = byId.get(slot.medicationId);
+    if (!medication || medication.ingredients.length === 0) continue;
+
+    const units = resolveUnitsPerDose({
+      scheduledFor: slot.scheduledFor,
+      timeZone: timezone,
+      medicationUnitsPerDose: medication.unitsPerDose,
+      schedules: medication.schedules,
+    });
+    if (!(units > 0)) continue;
+    const day = userDayKey(slot.scheduledFor, timezone);
+
+    for (const ingredient of medication.ingredients) {
+      if (!isNutrientCode(ingredient.nutrient)) continue;
+      const key = `${day}|${ingredient.nutrient}`;
+      const row = sums.get(key) ?? {
+        day,
+        nutrient: ingredient.nutrient,
+        amount: 0,
+        unit: NUTRIENT_CATALOG[ingredient.nutrient].unit,
+      };
+      row.amount += ingredient.amountPerUnit * units;
+      sums.set(key, row);
+    }
+  }
+
+  return [...sums.values()]
+    .map((row) => ({ ...row, amount: round(row.amount) }))
+    .filter((row) => row.amount > 0)
+    .sort((a, b) =>
+      a.day === b.day
+        ? a.nutrient.localeCompare(b.nutrient)
+        : a.day.localeCompare(b.day),
+    );
+}
+
+/** Serialise every pass for one account (transaction-scoped). */
+async function lockAccount(tx: Tx, userId: string): Promise<void> {
+  await tx.$queryRaw`SELECT 1 AS "locked" FROM (SELECT pg_advisory_xact_lock(hashtextextended(${`supplement-nutrients:${userId}`}, 0))) AS lock`;
+}
+
+async function loadSupplementMedications(
+  tx: Tx,
+  userId: string,
+): Promise<SupplementMedication[]> {
+  return tx.medication.findMany({
+    where: { userId, ingredients: { some: {} } },
+    select: {
+      id: true,
+      unitsPerDose: true,
+      schedules: {
+        select: { timesOfDay: true, windowStart: true, unitsPerDose: true },
+      },
+      ingredients: { select: { nutrient: true, amountPerUnit: true } },
+    },
+  });
+}
+
+async function loadTakenSlots(
+  tx: Tx,
+  userId: string,
+  medicationIds: string[],
+  window: { start: Date; end: Date } | null,
+): Promise<TakenSupplementSlot[]> {
+  if (medicationIds.length === 0) return [];
+  return tx.medicationIntakeEvent.findMany({
+    where: {
+      userId,
+      medicationId: { in: medicationIds },
+      deletedAt: null,
+      takenAt: { not: null },
+      skipped: false,
+      autoMissed: false,
+      ...(window
+        ? { scheduledFor: { gte: window.start, lt: window.end } }
+        : {}),
+    },
+    select: { medicationId: true, scheduledFor: true },
+  });
+}
+
+async function writeRows(
+  tx: Tx,
+  userId: string,
+  rows: SupplementNutrientRow[],
+): Promise<void> {
+  if (rows.length === 0) return;
+  await tx.nutrientIntakeDay.createMany({
+    data: rows.map((row) => ({
+      userId,
+      day: row.day,
+      nutrient: row.nutrient,
+      amount: row.amount,
+      unit: row.unit,
+      source: NUTRIENT_SOURCE.SUPPLEMENT,
+    })),
+  });
+}
+
+export interface SupplementRecomputeResult {
+  /** False when the module is off and nothing was touched. */
+  ran: boolean;
+  rowsWritten: number;
+}
+
+/**
+ * Recompute one local day's SUPPLEMENT rows for the account, across every
+ * medication with a composition.
+ */
+export async function recomputeSupplementNutrientsForDay(
+  userId: string,
+  dayKey: string,
+  timezone: string | null | undefined,
+): Promise<SupplementRecomputeResult> {
+  if (!(await isModuleEnabled(userId, "nutrients"))) {
+    return { ran: false, rowsWritten: 0 };
+  }
+  const tz = safeTimezone(timezone);
+  const { dayStart, dayEnd } = localDayWindow(dayKey, tz);
+  return prisma.$transaction(async (tx) => {
+    await lockAccount(tx, userId);
+    const medications = await loadSupplementMedications(tx, userId);
+    const slots = await loadTakenSlots(
+      tx,
+      userId,
+      medications.map((m) => m.id),
+      { start: dayStart, end: dayEnd },
+    );
+    // A slot near midnight is read by its UTC window; the local-day filter
+    // keeps exactly the day asked for.
+    const rows = supplementNutrientRows(slots, medications, tz).filter(
+      (row) => row.day === dayKey,
+    );
+    await tx.nutrientIntakeDay.deleteMany({
+      where: { userId, day: dayKey, source: NUTRIENT_SOURCE.SUPPLEMENT },
+    });
+    await writeRows(tx, userId, rows);
+    return { ran: true, rowsWritten: rows.length };
+  });
+}
+
+/**
+ * Recompute every SUPPLEMENT row of the account over the whole history: after
+ * a composition changes, a medication or its doses are deleted, or an import
+ * lands. Bounded by the account's own taken doses of medications that have a
+ * composition, which is a few thousand rows for years of a daily supplement.
+ */
+export async function recomputeSupplementNutrientsForUser(
+  userId: string,
+): Promise<SupplementRecomputeResult> {
+  if (!(await isModuleEnabled(userId, "nutrients"))) {
+    return { ran: false, rowsWritten: 0 };
+  }
+  const user = await prisma.user.findUnique({
+    where: { id: userId },
+    select: { timezone: true },
+  });
+  if (!user) return { ran: false, rowsWritten: 0 };
+  const tz = safeTimezone(user.timezone);
+  return prisma.$transaction(
+    async (tx) => {
+      await lockAccount(tx, userId);
+      const medications = await loadSupplementMedications(tx, userId);
+      const slots = await loadTakenSlots(
+        tx,
+        userId,
+        medications.map((m) => m.id),
+        null,
+      );
+      const rows = supplementNutrientRows(slots, medications, tz);
+      await tx.nutrientIntakeDay.deleteMany({
+        where: { userId, source: NUTRIENT_SOURCE.SUPPLEMENT },
+      });
+      await writeRows(tx, userId, rows);
+      return { ran: true, rowsWritten: rows.length };
+    },
+    { timeout: 60_000 },
+  );
+}
+
+/**
+ * The write-path hook: after a dose of `medicationId` on `dayKey` changed
+ * (taken, skipped, corrected, deleted, undone, recorded automatically).
+ * Cheap when the medication has no composition, which is almost always: one
+ * indexed existence read and nothing else. Best-effort, like every derived
+ * row: a failure is reported and never fails the dose write.
+ */
+export async function refreshSupplementNutrientsForDose(input: {
+  userId: string;
+  medicationId: string;
+  dayKey: string;
+  timezone: string | null | undefined;
+}): Promise<void> {
+  try {
+    const hasComposition = await prisma.medicationIngredient.findFirst({
+      where: { medicationId: input.medicationId, userId: input.userId },
+      select: { id: true },
+    });
+    if (!hasComposition) return;
+    await recomputeSupplementNutrientsForDay(
+      input.userId,
+      input.dayKey,
+      input.timezone,
+    );
+  } catch (err) {
+    const message = err instanceof Error ? err.message : String(err);
+    annotate({
+      meta: {
+        supplement_nutrient_refresh_failed: true,
+        supplement_nutrient_refresh_error: message,
+      },
+    });
+    console.error("[supplement-nutrients] day refresh failed:", message);
+  }
+}
diff --git a/src/lib/medications/list-read.ts b/src/lib/medications/list-read.ts
index 32f6301e8..f5c1a0785 100644
--- a/src/lib/medications/list-read.ts
+++ b/src/lib/medications/list-read.ts
@@ -83,7 +83,8 @@ export async function buildMedicationsList(
   ] = await Promise.all([
     prisma.medication.findMany({
       where: { userId },
-      include: { schedules: true },
+      // v1.43 — the ingredient count only, for `hasIngredients`.
+      include: { schedules: true, _count: { select: { ingredients: true } } },
       orderBy: { createdAt: "desc" },
     }),
     prisma.medicationIntakeEvent.groupBy({
@@ -310,8 +311,12 @@ export async function buildMedicationsList(
             liveSchedulesDto,
             Number(m.unitsPerDose),
           );
+    const { _count: counts, ...row } = m;
     return {
-      ...m,
+      ...row,
+      // v1.43 — whether a composition per unit is stored; the detail read
+      // carries the composition itself.
+      hasIngredients: counts.ingredients > 0,
       // v1.16.12 — Decimal → number so the wire stays a JSON number, not
       // the string Prisma would otherwise serialise a Decimal to.
       unitsPerDose: Number(m.unitsPerDose),
diff --git a/src/lib/nutrients/__tests__/catalog.test.ts b/src/lib/nutrients/__tests__/catalog.test.ts
index 3974c7353..28b6d9bc4 100644
--- a/src/lib/nutrients/__tests__/catalog.test.ts
+++ b/src/lib/nutrients/__tests__/catalog.test.ts
@@ -15,13 +15,25 @@ import {
   NUTRIENT_CATALOG,
   NUTRIENT_CODES,
   NUTRIENT_DEFINITIONS,
+  SYNCABLE_NUTRIENT_CODES,
+  isAboveUpperLimit,
   isNutrientCode,
+  isSyncableNutrientCode,
   resolveNutrientReference,
+  toCanonicalNutrientAmount,
 } from "../catalog";
 
+/** The codes HealthKit sends, which carry an HK identifier and a reference. */
+const SYNCABLE = NUTRIENT_DEFINITIONS.filter((d) => d.syncable);
+
 describe("nutrient catalog", () => {
-  it("carries exactly the 26 maintainer-scoped codes (no sodium, no potassium, no macros)", () => {
-    expect(NUTRIENT_CODES).toHaveLength(26);
+  it("carries exactly the 26 syncable codes plus the two supplement-only ones (no sodium, no potassium, no macros)", () => {
+    expect(SYNCABLE_NUTRIENT_CODES).toHaveLength(26);
+    expect(NUTRIENT_CODES).toHaveLength(28);
+    expect(NUTRIENT_CODES.filter((c) => !isSyncableNutrientCode(c))).toEqual([
+      "dha",
+      "epa",
+    ]);
     expect(Object.keys(NUTRIENT_CATALOG).sort()).toEqual(
       [...NUTRIENT_CODES].sort(),
     );
@@ -45,14 +57,14 @@ describe("nutrient catalog", () => {
   it("codes and HealthKit identifiers are unique, and every HK id is a Dietary quantity type", () => {
     const codes = new Set<string>();
     const hkIds = new Set<string>();
-    for (const def of NUTRIENT_DEFINITIONS) {
+    for (const def of SYNCABLE) {
+      expect(def.hkIdentifier).not.toBeNull();
+      const hk = def.hkIdentifier!;
       expect(codes.has(def.code)).toBe(false);
-      expect(hkIds.has(def.hkIdentifier)).toBe(false);
+      expect(hkIds.has(hk)).toBe(false);
       codes.add(def.code);
-      hkIds.add(def.hkIdentifier);
-      expect(def.hkIdentifier).toMatch(
-        /^HKQuantityTypeIdentifierDietary[A-Za-z0-9]+$/,
-      );
+      hkIds.add(hk);
+      expect(hk).toMatch(/^HKQuantityTypeIdentifierDietary[A-Za-z0-9]+$/);
     }
   });
 
@@ -93,10 +105,20 @@ describe("nutrient catalog", () => {
     expect(NUTRIENT_CATALOG.water.plausibleDailyMax).toBe(20000);
   });
 
-  it("every code has a reference entry carrying kind, direction, a citation, and a resolvable value", () => {
-    for (const def of NUTRIENT_DEFINITIONS) {
-      const ref = def.reference;
-      expect(ref, `missing reference: ${def.code}`).toBeDefined();
+  it("the supplement-only codes carry no HealthKit identifier and no reference of their own", () => {
+    for (const code of ["dha", "epa"] as const) {
+      const def = NUTRIENT_CATALOG[code];
+      expect(def.hkIdentifier).toBeNull();
+      expect(def.syncable).toBe(false);
+      expect(def.unit).toBe("mg");
+      expect(def.reference).toBeNull();
+    }
+  });
+
+  it("every syncable code has a reference entry carrying kind, direction, a citation, and a resolvable value", () => {
+    for (const def of SYNCABLE) {
+      const ref = def.reference!;
+      expect(ref, `missing reference: ${def.code}`).toBeTruthy();
       expect(["PRI", "AI", "safeLevel"]).toContain(ref.kind);
       expect(["target", "upperGuidance"]).toContain(ref.direction);
       expect(ref.source.length).toBeGreaterThan(0);
@@ -114,29 +136,29 @@ describe("nutrient catalog", () => {
   });
 
   it("caffeine is the one upperGuidance reference; everything else is a target", () => {
-    for (const def of NUTRIENT_DEFINITIONS) {
-      expect(def.reference.direction).toBe(
+    for (const def of SYNCABLE) {
+      expect(def.reference!.direction).toBe(
         def.code === "caffeine" ? "upperGuidance" : "target",
       );
     }
-    expect(NUTRIENT_CATALOG.caffeine.reference.kind).toBe("safeLevel");
-    expect(NUTRIENT_CATALOG.caffeine.reference.adult).toBe(400);
+    expect(NUTRIENT_CATALOG.caffeine.reference!.kind).toBe("safeLevel");
+    expect(NUTRIENT_CATALOG.caffeine.reference!.adult).toBe(400);
   });
 
   it("every citation names EFSA, except the documented chromium exception (EFSA sets no DRV)", () => {
-    for (const def of NUTRIENT_DEFINITIONS) {
+    for (const def of SYNCABLE) {
       if (def.code === "chromium") {
-        expect(def.reference.source).toContain("NIH");
-        expect(def.reference.source).toContain("EFSA");
+        expect(def.reference!.source).toContain("NIH");
+        expect(def.reference!.source).toContain("EFSA");
         continue;
       }
-      expect(def.reference.source, `citation: ${def.code}`).toContain("EFSA");
+      expect(def.reference!.source, `citation: ${def.code}`).toContain("EFSA");
     }
   });
 
   it("iron carries the EFSA sex split (11 male / 16 female)", () => {
-    expect(NUTRIENT_CATALOG.iron.reference.male).toBe(11);
-    expect(NUTRIENT_CATALOG.iron.reference.female).toBe(16);
+    expect(NUTRIENT_CATALOG.iron.reference!.male).toBe(11);
+    expect(NUTRIENT_CATALOG.iron.reference!.female).toBe(16);
   });
 
   it("every labelKey follows nutrients.names.<code> and resolves in the EN bundle", () => {
@@ -161,7 +183,7 @@ describe("resolveNutrientReference (v1.29)", () => {
       expect(ref?.value).toBe(950);
       expect(ref?.kind).toBe("PRI");
       expect(ref?.direction).toBe("target");
-      expect(ref?.source).toBe(NUTRIENT_CATALOG.calcium.reference.source);
+      expect(ref?.source).toBe(NUTRIENT_CATALOG.calcium.reference!.source);
     }
   });
 
@@ -185,12 +207,17 @@ describe("resolveNutrientReference (v1.29)", () => {
       kind: "safeLevel",
       direction: "upperGuidance",
       value: 400,
-      source: NUTRIENT_CATALOG.caffeine.reference.source,
+      source: NUTRIENT_CATALOG.caffeine.reference!.source,
     });
   });
 
-  it("resolves every catalog code to a non-null reference for at least one sex", () => {
-    for (const code of NUTRIENT_CODES) {
+  it("resolves no reference for a supplement-only code", () => {
+    expect(resolveNutrientReference("dha", "MALE")).toBeNull();
+    expect(resolveNutrientReference("epa", "FEMALE")).toBeNull();
+  });
+
+  it("resolves every syncable code to a non-null reference for at least one sex", () => {
+    for (const code of SYNCABLE_NUTRIENT_CODES) {
       const resolved =
         resolveNutrientReference(code, "MALE") ??
         resolveNutrientReference(code, "FEMALE");
@@ -198,3 +225,78 @@ describe("resolveNutrientReference (v1.29)", () => {
     }
   });
 });
+
+describe("input units and the converter (v1.43)", () => {
+  it("lists the canonical unit first with factor 1 on every code", () => {
+    for (const def of NUTRIENT_DEFINITIONS) {
+      expect(def.inputUnits[0]).toEqual({
+        unit: def.unit,
+        factorToCanonical: 1,
+      });
+      const units = def.inputUnits.map((u) => u.unit);
+      expect(new Set(units).size).toBe(units.length);
+      for (const u of def.inputUnits) {
+        expect(u.factorToCanonical).toBeGreaterThan(0);
+      }
+    }
+  });
+
+  it("converts vitamin D from IU at 0.025 µg per IU", () => {
+    expect(toCanonicalNutrientAmount("vitamin_d", 1000, "IU")).toBe(25);
+    expect(toCanonicalNutrientAmount("vitamin_d", 25, "ug")).toBe(25);
+    expect(toCanonicalNutrientAmount("vitamin_d", 0.025, "mg")).toBe(25);
+  });
+
+  it("converts across the metric ladder", () => {
+    expect(toCanonicalNutrientAmount("magnesium", 0.4, "g")).toBe(400);
+    expect(toCanonicalNutrientAmount("magnesium", 500, "ug")).toBe(0.5);
+    expect(toCanonicalNutrientAmount("dha", 0.5, "g")).toBe(500);
+    expect(toCanonicalNutrientAmount("water", 1.5, "l")).toBe(1500);
+  });
+
+  it("refuses a unit the code does not list rather than guessing", () => {
+    // Vitamin E has no IU: its factor depends on the natural or synthetic form.
+    expect(toCanonicalNutrientAmount("vitamin_e", 400, "IU")).toBeNull();
+    expect(toCanonicalNutrientAmount("magnesium", 10, "ml")).toBeNull();
+    expect(toCanonicalNutrientAmount("water", 10, "mg")).toBeNull();
+  });
+});
+
+describe("upper intake levels (v1.43)", () => {
+  it("carries a cited EFSA upper limit in the code's canonical unit where one exists", () => {
+    for (const def of NUTRIENT_DEFINITIONS) {
+      if (!def.upperLimit) continue;
+      expect(def.upperLimit.unit, def.code).toBe(def.unit);
+      expect(def.upperLimit.value).toBeGreaterThan(0);
+      expect(def.upperLimit.source).toContain("EFSA");
+    }
+    expect(NUTRIENT_CATALOG.vitamin_d.upperLimit?.value).toBe(100);
+    expect(NUTRIENT_CATALOG.magnesium.upperLimit?.scope).toBe("supplemental");
+    expect(NUTRIENT_CATALOG.vitamin_c.upperLimit).toBeNull();
+    expect(NUTRIENT_CATALOG.dha.upperLimit).toBeNull();
+  });
+
+  it("compares a total-scope limit against the day's total", () => {
+    expect(
+      isAboveUpperLimit("vitamin_d", { total: 120, supplemental: 50 }),
+    ).toBe(true);
+    expect(
+      isAboveUpperLimit("vitamin_d", { total: 100, supplemental: 100 }),
+    ).toBe(false);
+  });
+
+  it("compares a supplemental-scope limit against the supplement share only", () => {
+    expect(
+      isAboveUpperLimit("magnesium", { total: 600, supplemental: 200 }),
+    ).toBe(false);
+    expect(
+      isAboveUpperLimit("magnesium", { total: 300, supplemental: 300 }),
+    ).toBe(true);
+  });
+
+  it("answers null, not false, where no limit exists", () => {
+    expect(
+      isAboveUpperLimit("vitamin_c", { total: 5000, supplemental: 5000 }),
+    ).toBeNull();
+  });
+});
diff --git a/src/lib/nutrients/catalog.ts b/src/lib/nutrients/catalog.ts
index d69956529..f3079c885 100644
--- a/src/lib/nutrients/catalog.ts
+++ b/src/lib/nutrients/catalog.ts
@@ -2,8 +2,10 @@
  * Nutrient catalog — the closed code set for the micronutrient-intake
  * sync (v1.28).
  *
- * 26 codes: the 24 HealthKit `Dietary*` vitamin/mineral quantity types
- * plus DietaryWater and DietaryCaffeine. Energy, carbohydrates,
+ * 26 syncable codes: the 24 HealthKit `Dietary*` vitamin/mineral quantity
+ * types plus DietaryWater and DietaryCaffeine. v1.43 adds two codes no
+ * HealthKit type carries (`dha`, `epa`), which only a supplement's
+ * composition produces; they appear in responses and never in the batch. Energy, carbohydrates,
  * protein, fat, sugar, fiber AND sodium/potassium are deliberately NOT
  * here — the anti-goal against diet-app territory stands, and
  * sodium/potassium are food-composition signals, not "substances
@@ -38,7 +40,12 @@
 
 import type { BinaryReferenceSex } from "@/lib/profile/sex";
 
-export const NUTRIENT_CODES = [
+/**
+ * The codes HealthKit may send in the nutrient batch. `NUTRIENT_CODES` adds
+ * the supplement-only codes below them; the batch validates against this
+ * tuple, so its contract stays the 26 codes it always was.
+ */
+export const SYNCABLE_NUTRIENT_CODES = [
   // 13 vitamins
   "vitamin_a",
   "thiamin",
@@ -70,11 +77,62 @@ export const NUTRIENT_CODES = [
   "caffeine",
 ] as const;
 
+/**
+ * v1.43 — codes that come only from a supplement's composition. No HealthKit
+ * quantity type carries them, so the batch never accepts them and they appear
+ * in responses only.
+ */
+export const SUPPLEMENT_ONLY_NUTRIENT_CODES = ["dha", "epa"] as const;
+
+export const NUTRIENT_CODES = [
+  ...SYNCABLE_NUTRIENT_CODES,
+  ...SUPPLEMENT_ONLY_NUTRIENT_CODES,
+] as const;
+
 export type NutrientCode = (typeof NUTRIENT_CODES)[number];
+export type SyncableNutrientCode = (typeof SYNCABLE_NUTRIENT_CODES)[number];
 
 /** Canonical storage units. `ug` is µg on the wire — ASCII on purpose. */
 export type NutrientUnit = "mg" | "ug" | "ml";
 
+/**
+ * v1.43 — every unit an amount may be ENTERED in. The canonical units plus
+ * gram, litre and the international unit. IU exists only where one IU maps to
+ * one fixed mass (vitamin D, preformed vitamin A); vitamin E has none, because
+ * its IU depends on whether the form is natural or synthetic.
+ */
+export type NutrientInputUnitCode = NutrientUnit | "g" | "l" | "IU";
+
+/** The unit vocabulary, spelled once. Every other file reads it from here. */
+export const NUTRIENT_UNIT = {
+  mg: "mg",
+  ug: "ug",
+  ml: "ml",
+  g: "g",
+  l: "l",
+  IU: "IU",
+} as const satisfies Record<NutrientInputUnitCode, NutrientInputUnitCode>;
+
+export interface NutrientInputUnit {
+  unit: NutrientInputUnitCode;
+  /** Multiply an entered amount by this to get the canonical amount. */
+  factorToCanonical: number;
+}
+
+/**
+ * v1.43 — a tolerable upper intake level (UL): the highest daily intake not
+ * expected to cause harm. `scope: "total"` applies to everything taken in a
+ * day; `scope: "supplemental"` applies to the part from supplements only
+ * (magnesium salts, folic acid), which the server reads as the SUPPLEMENT
+ * source. `null` on a code where no UL is established.
+ */
+export interface NutrientUpperLimit {
+  value: number;
+  unit: NutrientUnit;
+  scope: "total" | "supplemental";
+  source: string;
+}
+
 export interface NutrientReference {
   /** EFSA value type, named in Coach prose later (Slice B). */
   kind: "PRI" | "AI" | "safeLevel";
@@ -91,8 +149,13 @@ export interface NutrientReference {
 
 export interface NutrientDefinition {
   code: NutrientCode;
-  /** HealthKit quantity type identifier iOS reads this code from. */
-  hkIdentifier: string;
+  /**
+   * HealthKit quantity type identifier iOS reads this code from. `null` for a
+   * supplement-only code (`dha`, `epa`).
+   */
+  hkIdentifier: string | null;
+  /** Whether HealthKit may send this code in the nutrient batch. */
+  syncable: boolean;
   /** Canonical storage unit AND the pinned HK query unit. */
   unit: NutrientUnit;
   /** i18n key for the display name (settings card + exports). */
@@ -103,7 +166,146 @@ export interface NutrientDefinition {
    * supplement reality so only unit confusion / corruption trips it.
    */
   plausibleDailyMax: number;
-  reference: NutrientReference;
+  /** The reference intake, or `null` where none is set per code. */
+  reference: NutrientReference | null;
+  /** v1.43 — the units an amount may be entered in, canonical first. */
+  inputUnits: ReadonlyArray<NutrientInputUnit>;
+  /** v1.43 — the tolerable upper intake level, or `null`. */
+  upperLimit: NutrientUpperLimit | null;
+}
+
+/**
+ * The input units each canonical unit offers by default: the unit itself and
+ * its neighbours in the metric ladder. A code adds IU on top where one exists.
+ */
+const METRIC_INPUT_UNITS: Readonly<
+  Record<NutrientUnit, ReadonlyArray<NutrientInputUnit>>
+> = {
+  mg: [
+    { unit: NUTRIENT_UNIT.mg, factorToCanonical: 1 },
+    { unit: NUTRIENT_UNIT.ug, factorToCanonical: 0.001 },
+    { unit: NUTRIENT_UNIT.g, factorToCanonical: 1000 },
+  ],
+  ug: [
+    { unit: NUTRIENT_UNIT.ug, factorToCanonical: 1 },
+    { unit: NUTRIENT_UNIT.mg, factorToCanonical: 1000 },
+  ],
+  ml: [
+    { unit: NUTRIENT_UNIT.ml, factorToCanonical: 1 },
+    { unit: NUTRIENT_UNIT.l, factorToCanonical: 1000 },
+  ],
+};
+
+/**
+ * The international unit where one IU is one fixed mass of the canonical unit.
+ * Vitamin D: 1 IU = 0.025 µg cholecalciferol. Vitamin A: 1 IU = 0.3 µg
+ * retinol (preformed vitamin A, the form supplements state in IU).
+ */
+const IU_FACTOR: Partial<Record<NutrientCode, number>> = {
+  vitamin_d: 0.025,
+  vitamin_a: 0.3,
+};
+
+/**
+ * The tolerable upper intake levels for adults, from EFSA's overview of the
+ * tolerable upper intake levels (2024 edition), each citing the opinion it
+ * rests on. A code that is absent has no established UL: EFSA set none
+ * (vitamin C, K, B1, B2, B5, B12, biotin, phosphorus, chromium), set a safe
+ * level of intake instead of a UL (iron 2024, manganese 2023), or set one that
+ * depends on a chemical form the composition cannot say (niacin: nicotinic
+ * acid 10 mg, nicotinamide 900 mg). EPA and DHA have none: EFSA (2012) found
+ * supplemental intakes up to 5 g a day of both combined raise no concern, which
+ * is a statement about the pair, not a per-nutrient limit.
+ */
+const UPPER_LIMITS: Partial<Record<NutrientCode, NutrientUpperLimit>> = {
+  vitamin_a: {
+    value: 3000,
+    unit: "ug",
+    scope: "total",
+    source:
+      "EFSA UL overview 2024 (SCF 2002): preformed vitamin A (retinol), adults",
+  },
+  vitamin_b6: {
+    value: 12,
+    unit: "mg",
+    scope: "total",
+    source: "EFSA UL overview 2024 (NDA Panel 2023): adults",
+  },
+  folate: {
+    value: 1000,
+    unit: "ug",
+    scope: "supplemental",
+    source:
+      "EFSA UL overview 2024 (NDA Panel 2023): folic acid from supplements and fortified foods, adults",
+  },
+  vitamin_d: {
+    value: 100,
+    unit: "ug",
+    scope: "total",
+    source: "EFSA UL overview 2024 (NDA Panel 2023): adults",
+  },
+  vitamin_e: {
+    value: 300,
+    unit: "mg",
+    scope: "total",
+    source: "EFSA UL overview 2024 (NDA Panel 2024): alpha-tocopherol, adults",
+  },
+  calcium: {
+    value: 2500,
+    unit: "mg",
+    scope: "total",
+    source: "EFSA UL overview 2024 (NDA Panel 2012): adults",
+  },
+  magnesium: {
+    value: 250,
+    unit: "mg",
+    scope: "supplemental",
+    source:
+      "EFSA UL overview 2024 (SCF 2001): readily dissociable magnesium salts in supplements, adults",
+  },
+  zinc: {
+    value: 25,
+    unit: "mg",
+    scope: "total",
+    source: "EFSA UL overview 2024 (SCF 2003): adults",
+  },
+  copper: {
+    value: 5,
+    unit: "mg",
+    scope: "total",
+    source: "EFSA UL overview 2024 (SCF 2003): adults",
+  },
+  selenium: {
+    value: 255,
+    unit: "ug",
+    scope: "total",
+    source: "EFSA UL overview 2024 (NDA Panel 2023): adults",
+  },
+  molybdenum: {
+    value: 600,
+    unit: "ug",
+    scope: "total",
+    source: "EFSA UL overview 2024 (SCF 2000): adults",
+  },
+  iodine: {
+    value: 600,
+    unit: "ug",
+    scope: "total",
+    source: "EFSA UL overview 2024 (SCF 2002): adults",
+  },
+};
+
+function inputUnitsFor(
+  code: NutrientCode,
+  unit: NutrientUnit,
+): ReadonlyArray<NutrientInputUnit> {
+  const iu = IU_FACTOR[code];
+  return iu === undefined
+    ? METRIC_INPUT_UNITS[unit]
+    : [
+        ...METRIC_INPUT_UNITS[unit],
+        { unit: NUTRIENT_UNIT.IU, factorToCanonical: iu },
+      ];
 }
 
 function def(
@@ -116,10 +318,34 @@ function def(
   return {
     code,
     hkIdentifier: `HKQuantityTypeIdentifierDietary${hkSuffix}`,
+    syncable: true,
     unit,
     labelKey: `nutrients.names.${code}`,
     plausibleDailyMax,
     reference,
+    inputUnits: inputUnitsFor(code, unit),
+    upperLimit: UPPER_LIMITS[code] ?? null,
+  };
+}
+
+/** A code that only a supplement's composition produces (v1.43). */
+function supplementOnly(
+  code: NutrientCode,
+  unit: NutrientUnit,
+  plausibleDailyMax: number,
+): NutrientDefinition {
+  return {
+    code,
+    hkIdentifier: null,
+    syncable: false,
+    unit,
+    labelKey: `nutrients.names.${code}`,
+    plausibleDailyMax,
+    // EFSA's adequate intake for these (250 mg a day) is set for EPA and DHA
+    // combined, so neither code carries a reference of its own.
+    reference: null,
+    inputUnits: inputUnitsFor(code, unit),
+    upperLimit: UPPER_LIMITS[code] ?? null,
   };
 }
 
@@ -300,6 +526,11 @@ export const NUTRIENT_CATALOG: Readonly<
     adult: 400,
     source: "EFSA 2015 scientific opinion on the safety of caffeine (adults)",
   }),
+  // ── Supplement-only (v1.43) ──────────────────────────────────────
+  // Omega-3 fatty acids from fish or algae oil capsules. The cap sits well
+  // above the 5 g a day EFSA reviewed, so only a unit slip trips it.
+  dha: supplementOnly("dha", "mg", 20000),
+  epa: supplementOnly("epa", "mg", 20000),
 });
 
 /** Catalog rows in canonical display order (the tuple order above). */
@@ -313,6 +544,71 @@ export function isNutrientCode(code: string): code is NutrientCode {
   return NUTRIENT_CODE_SET.has(code);
 }
 
+const SYNCABLE_CODE_SET: ReadonlySet<string> = new Set(SYNCABLE_NUTRIENT_CODES);
+
+/** True when HealthKit may send `code` in the nutrient batch. */
+export function isSyncableNutrientCode(
+  code: string,
+): code is SyncableNutrientCode {
+  return SYNCABLE_CODE_SET.has(code);
+}
+
+/**
+ * A code's catalogue entry with its position in display order, or `null` for
+ * a code the catalogue does not know.
+ */
+export function catalogEntryFor(
+  code: string,
+): (NutrientDefinition & { order: number }) | null {
+  if (!isNutrientCode(code)) return null;
+  return { ...NUTRIENT_CATALOG[code], order: NUTRIENT_CODES.indexOf(code) };
+}
+
+/** Round away binary noise from a unit factor (1000 IU × 0.025 = 25 µg). */
+function roundAmount(value: number): number {
+  return Math.round(value * 1e6) / 1e6;
+}
+
+/**
+ * v1.43 — convert an entered amount to the code's canonical unit. `null` when
+ * `unit` is not one of the code's input units: the caller refuses, it never
+ * guesses. This is the only unit conversion for nutrient amounts.
+ */
+export function toCanonicalNutrientAmount(
+  code: NutrientCode,
+  amount: number,
+  unit: string,
+): number | null {
+  const input = NUTRIENT_CATALOG[code].inputUnits.find((u) => u.unit === unit);
+  if (!input) return null;
+  return roundAmount(amount * input.factorToCanonical);
+}
+
+/** Whether `unit` is the code's canonical unit (nothing to convert). */
+export function isCanonicalNutrientUnit(
+  code: NutrientCode,
+  unit: string,
+): boolean {
+  return NUTRIENT_CATALOG[code].unit === unit;
+}
+
+/**
+ * v1.43 — whether a day is above the code's upper limit. `total` is the day's
+ * sum across sources; `supplemental` the part from taken supplement doses.
+ * `null` when the code has no upper limit, so "not above" and "no limit to be
+ * above" stay two different answers.
+ */
+export function isAboveUpperLimit(
+  code: NutrientCode,
+  amounts: { total: number; supplemental: number },
+): boolean | null {
+  const limit = NUTRIENT_CATALOG[code].upperLimit;
+  if (!limit) return null;
+  const compared =
+    limit.scope === "supplemental" ? amounts.supplemental : amounts.total;
+  return compared > limit.value;
+}
+
 /** A catalog reference resolved to one concrete number for a profile. */
 export interface ResolvedNutrientReference {
   kind: NutrientReference["kind"];
@@ -336,6 +632,7 @@ export function resolveNutrientReference(
   sex: BinaryReferenceSex | null,
 ): ResolvedNutrientReference | null {
   const ref = NUTRIENT_CATALOG[code].reference;
+  if (!ref) return null;
   const value =
     ref.adult ??
     (sex === "MALE" ? ref.male : sex === "FEMALE" ? ref.female : undefined);
diff --git a/src/lib/nutrients/read.ts b/src/lib/nutrients/read.ts
new file mode 100644
index 000000000..1f8a3329e
--- /dev/null
+++ b/src/lib/nutrients/read.ts
@@ -0,0 +1,191 @@
+/**
+ * The nutrient reads every surface shares: `GET /api/nutrients`,
+ * `GET /api/nutrients/daily` and the MCP `get_nutrients` tool.
+ *
+ * A day can carry one row per source (migration 0249 put `source` in the
+ * key, v1.43 added `SUPPLEMENT`), so every read sums a day across its rows
+ * and, since v1.43, also keeps the split by source and judges the day
+ * against the nutrient's upper intake level. The judgement is made here,
+ * once, so no client and no prompt ever compares a number against a limit
+ * of its own.
+ */
+import { prisma } from "@/lib/db";
+import {
+  NUTRIENT_CATALOG,
+  NUTRIENT_CODES,
+  isAboveUpperLimit,
+  isNutrientCode,
+  type NutrientCode,
+  type NutrientUpperLimit,
+} from "@/lib/nutrients/catalog";
+import {
+  NUTRIENT_SOURCE,
+  isNutrientSource,
+  type NutrientSource,
+} from "@/lib/nutrients/sources";
+import { shiftDateKey, userDayKey } from "@/lib/tz/format";
+
+/** A day's amount split by source; a source with nothing is absent. */
+export type NutrientAmountBySource = Partial<Record<NutrientSource, number>>;
+
+interface StoredRow {
+  nutrient: string;
+  day: string;
+  amount: number;
+  unit: string;
+  source: string;
+}
+
+interface DayFold {
+  total: number;
+  bySource: NutrientAmountBySource;
+}
+
+function addToDay(fold: DayFold, source: string, amount: number): void {
+  fold.total += amount;
+  // A source outside the closed set still counts toward the day's total; it
+  // only cannot be named in the split.
+  if (isNutrientSource(source)) {
+    fold.bySource[source] = (fold.bySource[source] ?? 0) + amount;
+  }
+}
+
+/** Whether one folded day is above the code's upper limit (null without one). */
+function dayAboveLimit(code: NutrientCode, fold: DayFold): boolean | null {
+  return isAboveUpperLimit(code, {
+    total: fold.total,
+    supplemental: fold.bySource[NUTRIENT_SOURCE.SUPPLEMENT] ?? 0,
+  });
+}
+
+/** The window's first day key, anchored on the caller's local today. */
+export function nutrientWindowStart(timezone: string, days: number): string {
+  return shiftDateKey(userDayKey(new Date(), timezone), -(days - 1));
+}
+
+export interface NutrientOverviewRow {
+  nutrient: NutrientCode;
+  unit: string;
+  latestDay: string;
+  latestAmount: number;
+  daysWithData: number;
+  latestBySource: NutrientAmountBySource;
+  upperLimit: NutrientUpperLimit | null;
+  latestAboveUpperLimit: boolean | null;
+}
+
+/**
+ * Per nutrient with data inside the window: the latest day, its total and its
+ * split, the count of distinct days with data, and the upper-limit verdict for
+ * the latest day. Catalog order; a stored code that fell out of the catalog is
+ * dropped rather than mislabelled.
+ */
+export async function readNutrientOverview(
+  userId: string,
+  timezone: string,
+  days: number,
+): Promise<{ nutrients: NutrientOverviewRow[]; rowCount: number }> {
+  const since = nutrientWindowStart(timezone, days);
+  const rows: StoredRow[] = await prisma.nutrientIntakeDay.findMany({
+    where: { userId, day: { gte: since } },
+    orderBy: [{ nutrient: "asc" }, { day: "desc" }],
+    select: {
+      nutrient: true,
+      unit: true,
+      day: true,
+      amount: true,
+      source: true,
+    },
+  });
+
+  const byCode = new Map<
+    string,
+    { unit: string; latestDay: string; latest: DayFold; daysSeen: Set<string> }
+  >();
+  for (const row of rows) {
+    let summary = byCode.get(row.nutrient);
+    if (!summary) {
+      // Rows arrive day-DESC inside each nutrient: the first day seen is the
+      // latest one.
+      summary = {
+        unit: row.unit,
+        latestDay: row.day,
+        latest: { total: 0, bySource: {} },
+        daysSeen: new Set(),
+      };
+      byCode.set(row.nutrient, summary);
+    }
+    // A set of distinct day keys, so a day with several source rows counts
+    // once.
+    summary.daysSeen.add(row.day);
+    if (row.day === summary.latestDay) {
+      addToDay(summary.latest, row.source, row.amount);
+    }
+  }
+
+  const nutrients = NUTRIENT_CODES.filter(
+    (code) => isNutrientCode(code) && byCode.has(code),
+  ).map((code) => {
+    const summary = byCode.get(code)!;
+    return {
+      nutrient: code,
+      unit: summary.unit,
+      latestDay: summary.latestDay,
+      latestAmount: summary.latest.total,
+      daysWithData: summary.daysSeen.size,
+      latestBySource: summary.latest.bySource,
+      upperLimit: NUTRIENT_CATALOG[code].upperLimit,
+      latestAboveUpperLimit: dayAboveLimit(code, summary.latest),
+    };
+  });
+
+  return { nutrients, rowCount: rows.length };
+}
+
+export interface NutrientDailyEntry {
+  day: string;
+  amount: number;
+  bySource: NutrientAmountBySource;
+  aboveUpperLimit: boolean | null;
+}
+
+/**
+ * One nutrient's dense day series over the window: one entry per calendar
+ * day, 0 and an empty split on a day without data, each judged against the
+ * upper limit.
+ */
+export async function readNutrientDaily(
+  userId: string,
+  timezone: string,
+  nutrient: NutrientCode,
+  days: number,
+): Promise<{ days: NutrientDailyEntry[]; rowCount: number }> {
+  const since = nutrientWindowStart(timezone, days);
+  const rows = await prisma.nutrientIntakeDay.findMany({
+    where: { userId, nutrient, day: { gte: since } },
+    select: { day: true, amount: true, source: true },
+  });
+
+  const folds = new Map<string, DayFold>();
+  for (const row of rows) {
+    let fold = folds.get(row.day);
+    if (!fold) {
+      fold = { total: 0, bySource: {} };
+      folds.set(row.day, fold);
+    }
+    addToDay(fold, row.source, row.amount);
+  }
+
+  const series: NutrientDailyEntry[] = [];
+  for (let i = 0; i < days; i++) {
+    const day = shiftDateKey(since, i);
+    const fold = folds.get(day) ?? { total: 0, bySource: {} };
+    series.push({
+      day,
+      amount: fold.total,
+      bySource: fold.bySource,
+      aboveUpperLimit: dayAboveLimit(nutrient, fold),
+    });
+  }
+  return { days: series, rowCount: rows.length };
+}
diff --git a/src/lib/nutrients/sources.ts b/src/lib/nutrients/sources.ts
new file mode 100644
index 000000000..483f28734
--- /dev/null
+++ b/src/lib/nutrients/sources.ts
@@ -0,0 +1,23 @@
+/**
+ * Where a nutrient day row came from. A closed set enforced here rather than
+ * by a database enum (`NutrientIntakeDay.source` is text and part of the key):
+ *
+ *   - `APPLE_HEALTH`: the day total HealthKit synced (`POST /api/nutrients/batch`);
+ *   - `MANUAL`: water entered by hand (`POST /api/nutrients/water`);
+ *   - `SUPPLEMENT` (v1.43): the sum of the day's taken supplement doses, from
+ *     each medication's composition. Derived and recomputed, never entered.
+ */
+export const NUTRIENT_SOURCE = {
+  APPLE_HEALTH: "APPLE_HEALTH",
+  MANUAL: "MANUAL",
+  SUPPLEMENT: "SUPPLEMENT",
+} as const;
+
+export type NutrientSource =
+  (typeof NUTRIENT_SOURCE)[keyof typeof NUTRIENT_SOURCE];
+
+const SOURCES: ReadonlySet<string> = new Set(Object.values(NUTRIENT_SOURCE));
+
+export function isNutrientSource(value: string): value is NutrientSource {
+  return SOURCES.has(value);
+}
diff --git a/src/lib/openapi/routes/nutrients.ts b/src/lib/openapi/routes/nutrients.ts
index fb2016342..3b4f8a872 100644
--- a/src/lib/openapi/routes/nutrients.ts
+++ b/src/lib/openapi/routes/nutrients.ts
@@ -48,9 +48,9 @@ const moduleDisabled = {
  * OpenAPI file is the one authoritative home of the code ↔ HK ↔ unit
  * contract (µg is `ug` on the wire; water is mL; never IU).
  */
-const catalogTable = NUTRIENT_DEFINITIONS.map(
-  (d) => `| ${d.code} | ${d.hkIdentifier} | ${d.unit} |`,
-).join("\n");
+const catalogTable = NUTRIENT_DEFINITIONS.filter((d) => d.syncable)
+  .map((d) => `| ${d.code} | ${d.hkIdentifier} | ${d.unit} |`)
+  .join("\n");
 
 const nutrientCatalogEntry = z
   .object({
diff --git a/src/lib/rollups/medication-compliance-rollups.ts b/src/lib/rollups/medication-compliance-rollups.ts
index 3fd256272..46f9e2e29 100644
--- a/src/lib/rollups/medication-compliance-rollups.ts
+++ b/src/lib/rollups/medication-compliance-rollups.ts
@@ -50,6 +50,7 @@
 import type { PrismaClient } from "@/generated/prisma/client";
 import { prisma } from "@/lib/db";
 import { getGlobalBoss } from "@/lib/jobs/boss-instance";
+import { refreshSupplementNutrientsForDose } from "@/lib/medications/ingredients/recompute";
 import { annotate } from "@/lib/logging/context";
 import { DEFAULT_TIMEZONE, isValidTimezone, userDayKey } from "@/lib/tz/format";
 import { localDayWindow, startOfLocalDayKey } from "@/lib/tz/local-day";
@@ -203,6 +204,21 @@ export async function recomputeMedicationComplianceForDay(
           AND "scheduled_for" <  ${windowEnd}
       )
   `;
+
+  // v1.43 — the day's other derived row: the micronutrients its taken
+  // supplement doses add (`source = SUPPLEMENT`). Every dose write path
+  // already funnels through this recompute, so this is the one place the
+  // hook needs to live. Only on the base client: a caller inside its own
+  // transaction (the dose import) has not committed the doses yet and
+  // queues the account's full recompute once it has.
+  if (client === prisma) {
+    await refreshSupplementNutrientsForDose({
+      userId,
+      medicationId,
+      dayKey,
+      timezone: safeTz,
+    });
+  }
 }
 
 /**
diff --git a/src/lib/validations/nutrients.ts b/src/lib/validations/nutrients.ts
index f7c462eb8..2fad5c706 100644
--- a/src/lib/validations/nutrients.ts
+++ b/src/lib/validations/nutrients.ts
@@ -9,14 +9,28 @@
  */
 import { z } from "zod/v4";
 
-import { NUTRIENT_CATALOG, NUTRIENT_CODES } from "@/lib/nutrients/catalog";
+import {
+  NUTRIENT_CATALOG,
+  NUTRIENT_CODES,
+  SYNCABLE_NUTRIENT_CODES,
+} from "@/lib/nutrients/catalog";
 
 export const MAX_NUTRIENT_ENTRIES_PER_BATCH = 500;
 
 export const nutrientCodeEnum = z.enum(NUTRIENT_CODES).meta({
   id: "NutrientCode",
   description:
-    "Closed nutrient catalog code — 24 HealthKit Dietary vitamin/mineral types plus water and caffeine. Energy, macros and sodium/potassium are out of scope.",
+    "Closed nutrient catalog code — 24 HealthKit Dietary vitamin/mineral types plus water and caffeine, and (v1.43, responses only) `dha` and `epa`, which only a supplement's composition produces. Energy, macros and sodium/potassium are out of scope. Decode unknown values leniently.",
+});
+
+/**
+ * v1.43 — the codes the batch accepts: the catalogue without the
+ * supplement-only codes, so the HealthKit sync contract stays unchanged.
+ */
+export const syncableNutrientCodeEnum = z.enum(SYNCABLE_NUTRIENT_CODES).meta({
+  id: "SyncableNutrientCode",
+  description:
+    "A nutrient code HealthKit may send: the 24 Dietary vitamin/mineral types plus water and caffeine. Never `dha` or `epa`.",
 });
 
 /**
@@ -30,7 +44,7 @@ export const nutrientCodeEnum = z.enum(NUTRIENT_CODES).meta({
 export const nutrientEntrySchema = z
   .object({
     day: z.string().regex(/^\d{4}-\d{2}-\d{2}$/),
-    nutrient: nutrientCodeEnum,
+    nutrient: syncableNutrientCodeEnum,
     unit: z.string().min(1).max(10),
     amount: z.number().finite().min(0),
     externalSourceVersion: z.string().min(1).max(120).optional(),