Are watercress high in oxalate?
A
No. Very low, none detected per 1 cup
One study at 0 mg, 34 g serving
0 mg50 mg = a day60 mg+
Watercress are low in oxalate: the one study here detected none in 1 cup.
50 or 100 mg a day: which target is yours
Where this number comes from
Each row is one published measurement, converted to a 34 g serving (1 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 |
|---|---|---|---|
| 0 mg | 0 mg | Not stated (n=1) | Hönow R., Hesse A, 2002via Foods 2023;12:3201, Table 5 (CC BY 4.0) |
By Oliver Silen · Data checked November 2, 2026 · Not medical advice