Is cola high in oxalate?
No. Very low, 1.5 mg per 12 oz can
Range 0 to 2.9 mg across 2 studies, 355 g serving
Cola is low in oxalate: about 1.5 mg per 12 oz can, which is 3% of the 50 mg a day many stone clinics aim for, or 2% of the 100 mg others allow.
50 or 100 mg a day: which target is yours
Why sources disagree on cola
The 2 studies here run from 0 to 2.9 mg per 12 oz can, measured between 2017 and 2023. They tested 2 preparations, and growing conditions, variety and lab method all move the number. Every one of them lands in grade A.
Where this number comes from
Each row is one published measurement, converted to a 355 g serving (12 oz can). 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 |
|---|---|---|---|
| 0 mg | 0 mg | caffeinated | Harvard T.H, 2023 |
| 2.9 mg | 0.81 mg | soft drinks (category) | Siener R, Seidler A, Voss S, Hesse A, 2017 |
By Oliver Silen · Data checked November 2, 2026 · Not medical advice