Are cashews high in oxalate?
Yes. Very high, 64 mg per 1 oz (about 18 cashews)
Range 63 to 64 mg across 1 study, 28 g serving
Lower-oxalate swap: Pistachios, grade B, about 9 mg per 1 oz (about 49 nuts).
Cashews are high in oxalate: about 64 mg per 1 oz (about 18 cashews), which is 128% of the 50 mg a day many stone clinics aim for.
If your doctor has put you on a low-oxalate diet, eat it with something high in calcium, like milk, yogurt or cheese. Calcium in the same meal binds oxalate in the gut, so less of it reaches your urine.
Where this number comes from
Each row is one published measurement, converted to a 28 g serving (1 oz (about 18 cashews)). 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 |
|---|---|---|---|
| 63 mg | 224 mg | oil roasted, unsalted | Harvard T.H, 2023 |
| 64 mg | 226.79 mg | Oil roasted | Harvard T.H, 2023 |
By Oliver Silen · Data checked November 2, 2026 · Not medical advice