Are green onions high in oxalate?
B
No. Low, 8.3 mg per 1/4 cup chopped
One study at 8.3 mg, 25 g serving
0 mg50 mg = a day60 mg+
Green onions are low in oxalate: about 8.3 mg per 1/4 cup chopped, which is 17% of the 50 mg a day many stone clinics aim for, or 8% 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 25 g serving (1/4 cup chopped). 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 soluble only* | 0 mg | Raw (n=3) | Santamaria P., Elia A., Serio F., Todaro E, 1999via Foods 2023;12:3201, Table 5 (CC BY 4.0) |
| 8.3 mg | 33.3 mg | Raw | Kim D.-J., Kim H., Kim M., Lee J, 2007via Foods 2023;12:3201, Table 5 (CC BY 4.0) |
* The study measured soluble oxalate only, which understates the total, so it's shown but doesn't set the grade.
By Oliver Silen · Data checked November 2, 2026 · Not medical advice