diff --git a/docs/api/openapi.yaml b/docs/api/openapi.yaml
index 20072acf6..8ca9ebec5 100644
--- a/docs/api/openapi.yaml
+++ b/docs/api/openapi.yaml
@@ -55784,11 +55784,14 @@ components:
                   properties:
                     value:
                       type: number
+                      description: The scored value in its canonical unit (fasting glucose in mg/dL).
                     unit:
                       type: string
+                      description: The canonical unit of `value`.
                     label:
                       type: string
-                      description: The complete display value, paired or panel values included.
+                      description: The complete display value, paired or panel values included, written in the reader's units (fasting glucose
+                        in the account's glucose unit).
                     asOf:
                       type: string
                       format: date-time
@@ -55817,12 +55820,15 @@ components:
                       anyOf:
                         - type: number
                         - type: "null"
+                      description: Lower band edge, canonical unit.
                     high:
                       anyOf:
                         - type: number
                         - type: "null"
+                      description: Upper band edge, canonical unit.
                     label:
                       type: string
+                      description: The band as display text, in the reader's units.
                     source:
                       type: string
                   required:
diff --git a/src/app/api/analytics/route.ts b/src/app/api/analytics/route.ts
index 02056525c..de8e909bd 100644
--- a/src/app/api/analytics/route.ts
+++ b/src/app/api/analytics/route.ts
@@ -34,7 +34,7 @@ import {
   GLUCOSE_PANEL_WINDOW_DAYS,
   type GlucoseClinicalMetrics,
 } from "@/lib/analytics/glucose-metrics";
-import { groupByGlucoseContext } from "@/lib/glucose";
+import { groupByGlucoseContext, resolveGlucoseUnit } from "@/lib/glucose";
 import {
   decisionForEvidence,
   PATTERN_FAMILIES,
@@ -619,6 +619,7 @@ async function buildAnalyticsResponse(user: AuthedUser, locale: Locale) {
       timezone: userTz,
       sourcePriorityJson: scoreSourcePriority,
       thresholdsJson: user.thresholdsJson ?? null,
+      glucoseUnit: resolveGlucoseUnit(user.glucoseUnit),
     },
     modules: {
       glucose: glucoseEnabled,
diff --git a/src/lib/analytics/score/__tests__/composition-source.test.ts b/src/lib/analytics/score/__tests__/composition-source.test.ts
index e28140842..89af33f19 100644
--- a/src/lib/analytics/score/__tests__/composition-source.test.ts
+++ b/src/lib/analytics/score/__tests__/composition-source.test.ts
@@ -240,6 +240,7 @@ function score(args: {
       timezone: "UTC",
       sourcePriorityJson: null,
       thresholdsJson: null,
+      glucoseUnit: "mg/dL" as const,
     },
     modules: args.modules,
     healthScoreConfigJson: args.healthScoreConfigJson,
diff --git a/src/lib/analytics/score/__tests__/config-change-is-not-a-health-event.test.ts b/src/lib/analytics/score/__tests__/config-change-is-not-a-health-event.test.ts
index 171e54fec..d031de698 100644
--- a/src/lib/analytics/score/__tests__/config-change-is-not-a-health-event.test.ts
+++ b/src/lib/analytics/score/__tests__/config-change-is-not-a-health-event.test.ts
@@ -318,6 +318,7 @@ function scoreInput(healthScoreConfigJson: unknown) {
       timezone: "UTC",
       sourcePriorityJson: null,
       thresholdsJson: null,
+      glucoseUnit: "mg/dL" as const,
     },
     modules: {
       glucose: true,
diff --git a/src/lib/analytics/score/__tests__/pillars.test.ts b/src/lib/analytics/score/__tests__/pillars.test.ts
index 67f173c85..939558c0d 100644
--- a/src/lib/analytics/score/__tests__/pillars.test.ts
+++ b/src/lib/analytics/score/__tests__/pillars.test.ts
@@ -14,6 +14,7 @@ const live = {
   source: "live" as const,
   readFailed: false,
   timezone: "Europe/Berlin",
+  glucoseUnit: "mg/dL" as const,
 };
 
 function days(count: number, value: number) {
@@ -160,6 +161,41 @@ describe("reference-score pillars", () => {
     expect(eligible.status).toBe("ok");
   });
 
+  it("writes the fasting labels in the reader's glucose unit, value and band canonical", () => {
+    const fasting = days(8, 99).map((point) => ({
+      value: point.value,
+      at: new Date(`${point.day}T08:00:00Z`),
+      source: "APPLE_HEALTH",
+    }));
+    const mmol = computeGlycaemiaPillar({
+      ...live,
+      glucoseUnit: "mmol/L",
+      asOf: NOW,
+      hba1c: [],
+      fastingGlucose: fasting,
+    });
+    const mgdl = computeGlycaemiaPillar({
+      ...live,
+      asOf: NOW,
+      hba1c: [],
+      fastingGlucose: fasting,
+    });
+    expect(mmol.status).toBe("ok");
+    expect(mgdl.status).toBe("ok");
+    if (mmol.status !== "ok" || mgdl.status !== "ok") return;
+    // These labels reach the app as finished text.
+    expect(mmol.value.observed.label).toBe("Fasting median 5.5 mmol/L");
+    expect(mmol.value.reference.label).toBe("3.9–5.5 mmol/L fasting");
+    expect(mgdl.value.observed.label).toBe("Fasting median 99 mg/dL");
+    expect(mgdl.value.reference.label).toBe("70–99 mg/dL fasting");
+    // The score and the numbers the web converts from do not move.
+    expect(mmol.value.observed.value).toBe(99);
+    expect(mmol.value.observed.unit).toBe("mg/dL");
+    expect(mmol.value.reference.low).toBe(70);
+    expect(mmol.value.reference.high).toBe(99);
+    expect(mmol.value.score).toBe(mgdl.value.score);
+  });
+
   it("does not use fasting fallback when the preferred lab read failed", () => {
     const result = computeGlycaemiaPillar({
       ...live,
diff --git a/src/lib/analytics/score/__tests__/reader.test.ts b/src/lib/analytics/score/__tests__/reader.test.ts
index 972fd9190..af86b62af 100644
--- a/src/lib/analytics/score/__tests__/reader.test.ts
+++ b/src/lib/analytics/score/__tests__/reader.test.ts
@@ -137,6 +137,7 @@ describe("score reader bounds and source parity", () => {
         timezone: "Europe/Berlin",
         sourcePriorityJson: null,
         thresholdsJson: null,
+        glucoseUnit: "mg/dL" as const,
       },
       modules: {
         glucose: true,
diff --git a/src/lib/analytics/score/__tests__/reference-citation-guard.test.ts b/src/lib/analytics/score/__tests__/reference-citation-guard.test.ts
index 75a459e86..a88abdb95 100644
--- a/src/lib/analytics/score/__tests__/reference-citation-guard.test.ts
+++ b/src/lib/analytics/score/__tests__/reference-citation-guard.test.ts
@@ -233,6 +233,7 @@ const live = {
   source: "live" as const,
   readFailed: false,
   timezone: "Europe/Berlin",
+  glucoseUnit: "mg/dL" as const,
 };
 
 function days(count: number, value: number) {
diff --git a/src/lib/analytics/score/derived.ts b/src/lib/analytics/score/derived.ts
index 4065c65a1..5a70969f7 100644
--- a/src/lib/analytics/score/derived.ts
+++ b/src/lib/analytics/score/derived.ts
@@ -5,6 +5,7 @@ import { getBpTargets } from "@/lib/analytics/bp-targets";
 import { resolveModuleMap } from "@/lib/modules/gate";
 import { loadUserSourcePriority } from "@/lib/rollups/measurement-read";
 import { DEFAULT_TIMEZONE } from "@/lib/tz/format";
+import { resolveGlucoseUnit } from "@/lib/glucose";
 
 import { computeAndRecordUserHealthScore } from "./record";
 import type { CompositeValue } from "./types";
@@ -23,6 +24,7 @@ export async function computeHealthScoreDerived(
       timezone: true,
       thresholdsJson: true,
       healthScoreConfigJson: true,
+      glucoseUnit: true,
     },
   });
   const now = new Date();
@@ -59,6 +61,7 @@ export async function computeHealthScoreDerived(
       timezone,
       sourcePriorityJson,
       thresholdsJson: user.thresholdsJson,
+      glucoseUnit: resolveGlucoseUnit(user.glucoseUnit),
     },
     modules: {
       glucose: modules.glucose !== false,
diff --git a/src/lib/analytics/score/glycaemia.ts b/src/lib/analytics/score/glycaemia.ts
index 08cb64555..b62462a02 100644
--- a/src/lib/analytics/score/glycaemia.ts
+++ b/src/lib/analytics/score/glycaemia.ts
@@ -1,4 +1,5 @@
 import type { Derived } from "@/lib/insights/derived/types";
+import { convertGlucose } from "@/lib/glucose";
 
 import type { GlycaemiaPillarInput, PillarValue } from "./types";
 import {
@@ -153,10 +154,13 @@ export function computeGlycaemiaPillar(
         FASTING_GLUCOSE_REFERENCE.low,
         FASTING_GLUCOSE_REFERENCE.high,
       ),
+      // `value`, `unit` and the band stay canonical: the score is computed on
+      // them and the web converts from them. The labels are finished text a
+      // client prints as-is, so they are written in the reader's unit.
       observed: {
         value: observed,
         unit: "mg/dL",
-        label: `Fasting median ${Math.round(observed)} mg/dL`,
+        label: `Fasting median ${convertGlucose(observed, input.glucoseUnit)} ${input.glucoseUnit}`,
         asOf: fasting.at(-1)!.at.toISOString(),
         sources: uniqueSources(fasting.map((row) => row.source)),
       },
@@ -164,7 +168,7 @@ export function computeGlycaemiaPillar(
         kind: "clinical-threshold",
         low: FASTING_GLUCOSE_REFERENCE.low,
         high: FASTING_GLUCOSE_REFERENCE.high,
-        label: `${FASTING_GLUCOSE_REFERENCE.low}–${FASTING_GLUCOSE_REFERENCE.high} mg/dL fasting`,
+        label: `${convertGlucose(FASTING_GLUCOSE_REFERENCE.low, input.glucoseUnit)}–${convertGlucose(FASTING_GLUCOSE_REFERENCE.high, input.glucoseUnit)} ${input.glucoseUnit} fasting`,
         source: "ADA 2025; Selvin 2010",
       },
       noiseFloor: Math.max(1, Math.abs(ceilingScore - floorScore)),
diff --git a/src/lib/analytics/score/reader.ts b/src/lib/analytics/score/reader.ts
index 7f9e80559..eae8b85a8 100644
--- a/src/lib/analytics/score/reader.ts
+++ b/src/lib/analytics/score/reader.ts
@@ -42,6 +42,7 @@ import type { HealthScoreReport, PillarInputs, ScorePillarId } from "./types";
 import { computeWeightGoal } from "./weight-goal";
 import { DAY_MS, uniqueSources } from "./shared";
 import type { DerivedProvenanceSource } from "@/lib/insights/derived/types";
+import type { GlucoseUnit } from "@/lib/glucose";
 
 const HISTORY_OFFSET_DAYS = 14;
 const SCORE_READ_DAYS = 365 + HISTORY_OFFSET_DAYS;
@@ -52,6 +53,12 @@ export interface ScoreReaderProfile {
   timezone: string;
   sourcePriorityJson: unknown;
   thresholdsJson: unknown;
+  /**
+   * The record's glucose unit, for the glycaemia pillar's display labels.
+   * Required: those labels are served as finished text (the app prints them
+   * verbatim), and a caller that forgets the unit must not get mg/dL.
+   */
+  glucoseUnit: GlucoseUnit;
 }
 
 export interface UserHealthScoreInput {
@@ -513,6 +520,7 @@ function scoreInputsFor(args: {
     },
     GLYCAEMIA: {
       source: "live",
+      glucoseUnit: input.profile.glucoseUnit,
       readFailed:
         (!input.modules.glucose || !args.glucose.ok) &&
         (!input.modules.labs || !args.labs.ok),
diff --git a/src/lib/analytics/score/types.ts b/src/lib/analytics/score/types.ts
index 44dc7ed1b..67c25081a 100644
--- a/src/lib/analytics/score/types.ts
+++ b/src/lib/analytics/score/types.ts
@@ -8,6 +8,7 @@ import type {
 // runtime cycle. The tier's definition belongs beside the rule that
 // produces it; its NAME belongs here, where the wire shape is declared.
 import type { ScoreBreadthTier } from "./breadth";
+import type { GlucoseUnit } from "@/lib/glucose";
 
 /**
  * The scoring method's identity.
@@ -346,6 +347,12 @@ export interface GlucoseReading {
 
 export interface GlycaemiaPillarInput extends DomainReadState {
   asOf: Date;
+  /**
+   * The unit the fasting-glucose labels are written in. The scored value,
+   * its `unit` and the reference band stay canonical mg/dL; only the two
+   * human-readable labels follow the reader.
+   */
+  glucoseUnit: GlucoseUnit;
   hba1cReadFailed?: boolean;
   fastingReadFailed?: boolean;
   hba1c: HbA1cReading[];
diff --git a/src/lib/dashboard/snapshot.ts b/src/lib/dashboard/snapshot.ts
index 6d0f074a7..83dd06f32 100644
--- a/src/lib/dashboard/snapshot.ts
+++ b/src/lib/dashboard/snapshot.ts
@@ -49,7 +49,7 @@ import {
   GLUCOSE_PANEL_WINDOW_DAYS,
   type GlucoseClinicalMetrics,
 } from "@/lib/analytics/glucose-metrics";
-import { groupByGlucoseContext } from "@/lib/glucose";
+import { groupByGlucoseContext, resolveGlucoseUnit } from "@/lib/glucose";
 import {
   computeBpInTargetFastPath,
   type BpInTargetEnvelope,
@@ -788,6 +788,7 @@ async function buildExtras(
         timezone: userTz,
         sourcePriorityJson: scoreSourcePriority,
         thresholdsJson: user.thresholdsJson,
+        glucoseUnit: resolveGlucoseUnit(user.glucoseUnit),
       },
       modules: {
         glucose: modules.glucose !== false,
diff --git a/src/lib/openapi/routes/analytics.ts b/src/lib/openapi/routes/analytics.ts
index f51360fee..41dda0037 100644
--- a/src/lib/openapi/routes/analytics.ts
+++ b/src/lib/openapi/routes/analytics.ts
@@ -239,11 +239,17 @@ const scorePillarIdEnum = z.enum(SCORE_PILLAR_IDS);
 const pillarValue = z.object({
   score: z.number(),
   observed: z.object({
-    value: z.number(),
-    unit: z.string(),
+    value: z
+      .number()
+      .describe(
+        "The scored value in its canonical unit (fasting glucose in mg/dL).",
+      ),
+    unit: z.string().describe("The canonical unit of `value`."),
     label: z
       .string()
-      .describe("The complete display value, paired or panel values included."),
+      .describe(
+        "The complete display value, paired or panel values included, written in the reader's units (fasting glucose in the account's glucose unit).",
+      ),
     asOf: z.iso.datetime({ offset: true }),
     sources: z.array(z.string()),
   }),
@@ -253,9 +259,11 @@ const pillarValue = z.object({
       "population-percentile",
       "guideline-band",
     ]),
-    low: z.number().nullable(),
-    high: z.number().nullable(),
-    label: z.string(),
+    low: z.number().nullable().describe("Lower band edge, canonical unit."),
+    high: z.number().nullable().describe("Upper band edge, canonical unit."),
+    label: z
+      .string()
+      .describe("The band as display text, in the reader's units."),
     source: z.string(),
   }),
   personalReference: z