Leafy greens

Is purslane high in oxalate?

Lower-oxalate swap: Kale, grade A, about <1 mg per 1 cup raw.

Purslane is high in oxalate: about 39 mg per 1 cup raw, which is 78% of the 50 mg a day many stone clinics aim for, or 39% of the 100 mg others allow.

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. How much calcium, and what if you don't eat dairy.

50 or 100 mg a day: which target is yours

Boiling and draining lowers oxalate, because the soluble part leaches into the water. Compare the raw and boiled rows below.

Why sources disagree on purslane

This page grades the raw value, since that's how a serving of purslane is usually eaten. Another measurement, boiled at 52 mg per 1 cup raw, shows in the table below but doesn't set the grade.

Where this number comes from

Each row is one published measurement, converted to a 43 g serving (1 cup raw). The grade and the range use the rows prepared the way the serving is eaten, and take the middle. How the grades work.

By Oliver Silen · Data checked November 2, 2026 · Not medical advice