Are blueberries high in oxalate?
C
Moderately. Moderate, 19 mg per 1/2 cup
One study at 19 mg, 74 g serving
0 mg50 mg = a day60 mg+
Lower-oxalate swap: Strawberries, grade A, about 3.4 mg per 1 cup.
Blueberries have a moderate amount of oxalate: about 19 mg per 1/2 cup, which is 38% of the 50 mg a day many stone clinics aim for, or 19% of the 100 mg others allow.
50 or 100 mg a day: which target is yours
Where this number comes from
Each row is one published measurement, converted to a 74 g serving (1/2 cup). The grade and the range use the rows prepared the way the serving is eaten, and take the middle. How the grades work.
| Per serving | Per 100 g | Preparation | Source |
|---|---|---|---|
| 19 mg | 25 mg | Raw | Harvard T.H, 2023 |
By Oliver Silen · Data checked November 2, 2026 · Not medical advice