Are corn tortillas high in oxalate?
C
Moderately. Moderate, 10 mg per 2 tortillas
One study at 10 mg, 52 g serving
0 mg50 mg = a day60 mg+
Lower-oxalate swap: Flour tortillas, grade B, about 9 mg per 2 tortillas.
Corn tortillas have a moderate amount of oxalate: about 10 mg per 2 tortillas, which is 20% of the 50 mg a day many stone clinics aim for, or 10% 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 52 g serving (2 tortillas). 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 |
|---|---|---|---|
| 10 mg | 19.23 mg | Corn | Harvard T.H, 2023 |
By Oliver Silen · Data checked November 2, 2026 · Not medical advice