Are bran flakes high in oxalate?
D
Yes. High, 43 mg per 1 cup
Range 43 to 43 mg across 1 study, 36 g serving
0 mg50 mg = a day60 mg+
Lower-oxalate swap: Corn flakes, grade A, about <1 mg per 1 1/2 cups.
Bran flakes are high in oxalate: about 43 mg per 1 cup, which is 86% of the 50 mg a day many stone clinics aim for.
If your doctor has put you on a low-oxalate diet, eat it with something high in calcium, like milk, yogurt or cheese. Calcium in the same meal binds oxalate in the gut, so less of it reaches your urine.
Where this number comes from
Each row is one published measurement, converted to a 36 g serving (1 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 |
|---|---|---|---|
| 43 mg | 118.61 mg | Ready to eat | Harvard T.H, 2023 |
By Oliver Silen · Data checked November 2, 2026 · Not medical advice