diff --git a/apps/api/src/lib/memoryImpact.ts b/apps/api/src/lib/memoryImpact.ts
index bf441b3..d06a0f1 100644
--- a/apps/api/src/lib/memoryImpact.ts
+++ b/apps/api/src/lib/memoryImpact.ts
@@ -132,15 +132,30 @@ export async function computeMemoryImpact(options: MemoryImpactOptions): Promise
         .where(eq(schema.householdMembers.householdId, householdId))
     : [];
   const memberIds = members.length ? members.map((m) => m.userId) : [userId];
-  const allPrefs = await db
+
+  // Läs bara den anropande användarens fulla preferensrad; personliga data från
+  // andra hushållsmedlemmar läcker aldrig in i impact-beräkningen.
+  const myPrefs = await db
     .select()
     .from(schema.userPreferences)
+    .where(eq(schema.userPreferences.userId, userId))
+    .limit(1)
+    .then((rows) => rows[0]);
+
+  // För säkerhetsfiltrering behöver vi endast de begränsande fälten från alla
+  // medlemmar — inte deras personliga preferenser.
+  const householdRestrictionRows = await db
+    .select({
+      allergens: schema.userPreferences.allergens,
+      avoidIngredientIds: schema.userPreferences.avoidIngredientIds,
+      spiceLevelMax: schema.userPreferences.spiceLevelMax,
+    })
+    .from(schema.userPreferences)
     .where(inArray(schema.userPreferences.userId, memberIds));
 
-  const combinedAllergens = [...new Set(allPrefs.flatMap((p) => p.allergens))];
-  const combinedAvoid = [...new Set(allPrefs.flatMap((p) => p.avoidIngredientIds))];
-  const strictestSpice = Math.min(...allPrefs.map((p) => p.spiceLevelMax), 5);
-  const myPrefs = allPrefs.find((p) => p.userId === userId);
+  const combinedAllergens = [...new Set(householdRestrictionRows.flatMap((p) => p.allergens))];
+  const combinedAvoid = [...new Set(householdRestrictionRows.flatMap((p) => p.avoidIngredientIds))];
+  const strictestSpice = Math.min(...householdRestrictionRows.map((p) => p.spiceLevelMax), 5);
 
   // --- 3. Kandidater ---
   const candidates = await db