Are corn flakes high in oxalate?
A
No. Very low, <1 mg per 1 1/2 cups
Range <1 to <1 mg across 1 study, 42 g serving
0 mg50 mg = a day60 mg+
Corn flakes are low in oxalate: about <1 mg per 1 1/2 cups, which is 2% of the 50 mg a day many stone clinics aim for.
Where this number comes from
Each row is one published measurement, converted to a 42 g serving (1 1/2 cups). 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 |
|---|---|---|---|
| <1 mg | 1.9 mg | Ready to eat | Harvard T.H, 2023 |
By Oliver Silen · Data checked November 2, 2026 · Not medical advice