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Is Berries Safe for Kidney Stones? (Avoid)

🚫 Berries scores 105 mg oxalate per 1 cup — solidly in the Avoid zone (100+ mg). If you're prone to kidney stones, this is one to steer clear of. The number comes from Harvard's lab analysis (2024).
✓ Medically Reviewed Based on Harvard T.H. Chan SPH oxalate data (2024) and NKF/AUA dietary guidelines.
105
mg oxalate
per serving
Food: Berries, Elderberries, raw, black
Serving: 1 cup (145 g)
Verdict: 🔴 Avoid
Per 100g: 72 mg
Data: Harvard T.H. Chan SPH (2024)
💡 What This Means for Your Diet

What this means: Berries is rated Avoid (🔴). At 105 mg oxalate per serving, Berries 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.

❓ Related Questions

Why does the safe threshold matter?

The 25 mg per serving threshold is based on clinical guidance for kidney stone patients. Harvard's lab data (2024) provides the most reliable oxalate measurements available — no database estimates, direct lab analysis.

Can I eat this food every day?

If it's in the Safe zone (under 25 mg/serving), yes — it can be a regular part of your diet. For Caution or Avoid foods, frequency matters. Rotate them with lower-oxalate options throughout the week.

Where does the oxalate data come from?

Harvard T.H. Chan School of Public Health (2024) via the OHF database. These are direct laboratory measurements — the most reliable oxalate data available for food.

Should I also check sodium and calcium?

Yes — kidney stone risk isn't just about oxalate. High sodium increases urinary calcium (a stone promoter). Adequate dietary calcium (from food, not supplements) actually binds oxalate in your gut. Check the food's full nutrition page for the complete picture.

Berries full page 🟢 Safe foods Avoid foods
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.