Purslane — Low or High Oxalate?

Based on Harvard's 2024 lab measurements, Purslane falls in the **High Oxalate** range (100+ mg/serving). This is the category kidney stone patients need to be most careful with — consider limiting or substituting. At 248 mg per serving, Purslane is one to approach with caution.

✓ Medically Reviewed Based on Harvard T.H. Chan SPH oxalate data (2024) and NKF/AUA dietary guidelines.

248
mg oxalate
per serving

Food: Purslane, leaves
Serving: 1 cup (40 g)
Verdict: 🔴 Avoid
Per 100g: 621 mg
Data: Harvard T.H. Chan SPH (2024)

💡 What This Means for Your Diet

What this means: Purslane is rated Avoid (🔴). At 248 mg oxalate per serving, Purslane exceeds the 100 mg threshold. Kidney stone patients should limit or avoid this food. If you do eat it, keep portions very small, pair it with calcium, and drink extra water. Check the full food page for safer alternatives.

📊 How Purslane Compares

Among vegetables, Purslane sits well above the category average of 27 mg. For context, 219 out of 271 vegetables (80%) are rated 🟢 Safe (under 25 mg oxalate/serving). The average vegetables in our database has 27 mg oxalate per serving — which means Purslane is 818% above the category norm. Within its specific category, Purslane ranks on the higher end for oxalate. This context matters because two 'Safe' foods can have very different oxalate levels — one might have 5 mg while another has 24 mg. Both are Safe, but the first gives you more dietary flexibility. Browse all vegetables rated Avoid to compare within the same verdict level.

❓ Related Questions

What's the difference between 'Low' and 'Safe'?

Low Oxalate means under 25 mg per serving — the same threshold as Safe. They're equivalent in practice. The verdict system uses Low/Moderate/High to describe oxalate categories and Safe/Caution/Avoid to recommend dietary action.

Can oxalate levels change with cooking?

Yes. Boiling and discarding water can reduce soluble oxalate by 30-50% in many vegetables. Check the food's main page or cooking-specific angle page for details on preparation effects.

Is 'Low Oxalate' the same as 'No Oxalate'?

No — almost all plant foods contain some oxalate. 'Low Oxalate' means under 25 mg per serving, which is considered safe for kidney stone patients. Only purified products like sugar, oil, and salt have near-zero oxalate.

This is dietary reference information, NOT medical advice. Talk to your doctor or a registered dietitian before changing your diet. Oxalate tolerance varies by person, stone type, and medication.