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🟢 Lemon VS 🟡 Kiwi

If you're trying to decide between Kiwi and Lemon for a kidney stone diet, the numbers tell a clear story. Kiwi has 27 mg oxalate vs Lemon's 1 mg — that's a 27x difference measured by Harvard's lab.

✓ Medically Reviewed Content reviewed by OxalateWatch editorial team. Based on Harvard T.H. Chan SPH oxalate data (2024) and NKF/AUA dietary guidelines.

⚖️ Head-to-Head Comparison

🟢
Lemon
Safe — Low Oxalate
1 mg oxalate / serving
Serving: 1 slice (7 g)
Per 100 g: 8 mg oxalate
Sodium: 1 mg/100g | Calcium: 6 mg/100g | Protein: 0.3 g/100g
🟡
Kiwi
Caution — Moderate Oxalate
27 mg oxalate / serving
Serving: 1 medium w (76 g)
Per 100 g: 36 mg oxalate
Sodium: — | Calcium: — | Protein: —

🏆 The Verdict: Choose Lemon

At 1 mg oxalate per serving (rated Safe), Lemon is the clear winner over Kiwi (27 mg, Caution). The 27x difference comes from Harvard's 2024 lab measurements — this isn't an estimate or guess. Build your meals around Lemon and use Kiwi sparingly, if at all.

🔍 Key Takeaways

**Oxalate gap:** 27 mg vs 1 mg per serving — a 27x difference. One of these is significantly easier to fit into a kidney stone diet.
**Verdicts:** Kiwi is rated **Caution (25-99 mg/serving)**; Lemon is rated **Safe (under 25 mg/serving)**.
**Serving strategy:** If you choose Kiwi, consider a half portion or pair it with a calcium source. Lemon can be eaten more freely.

❓ Frequently Asked Questions

Which is better for kidney stones — Kiwi or Lemon?

Lemon is the clear winner. At 1 mg oxalate per serving, it's rated Safe — compared to Kiwi's 27 mg. That's a 27x difference. If you're managing kidney stones, Lemon is the safer everyday choice. But Kiwi isn't permanently off-limits — just be aware of portions and frequency.

Can I eat Kiwi and Lemon together?

Yes, but watch your portions. Combined, you're looking at roughly 28 mg oxalate. If one is high-oxalate, keep it to a small side portion. The lower-oxalate food can fill most of your plate.

How should I prepare Kiwi vs Lemon differently?

Key difference: Kiwi benefits significantly from boiling (discard the water!) — that can reduce oxalate by 30-50%. Lemon doesn't need special prep since its oxalate is already low. Roasting, steaming, or eating raw are all fine for the low-oxalate option.

What are good substitutes if I want to avoid Kiwi?

Lemon is the #1 substitute in the same category. Beyond that, look for foods with the 🟢 Safe rating in the Fruits category — they're all under 25 mg oxalate per serving and verified by Harvard (2024).

Browse all Fruits 🟢 Low Oxalate Foods Lemon page Kiwi page
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.