Are sunflower seeds high in oxalate?
A
No. Very low, 2.9 mg per 1/4 cup
Range 2.9 to 2.9 mg across 1 study, 35 g serving
0 mg50 mg = a day60 mg+
Sunflower seeds are low in oxalate: about 2.9 mg per 1/4 cup, which is 6% 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 35 g serving (1/4 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 |
|---|---|---|---|
| 2.9 mg | 8.29 mg | Dried kernels | Harvard T.H, 2023 |
By Oliver Silen · Data checked November 2, 2026 · Not medical advice