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🟢 Lettuce, iceberg VS 🟡 Potato, Russet

Let's be clear: Potato, Russet is the much safer choice here. At just 29 mg oxalate per serving, it's solidly in the safe zone — compared to Lettuce, iceberg's 1 mg. If you're managing kidney stones and choosing between these two, the math is straightforward.

✓ 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

🟢
Lettuce, iceberg
Safe — Low Oxalate
1 mg oxalate / serving
Serving: 1 cup shredded (72 g)
Per 100 g: 0 mg oxalate
Sodium: — | Calcium: — | Protein: —
🟡
Potato, Russet
Caution — Moderate Oxalate
29 mg oxalate / serving
Serving: 1/2 cup, chopped (64 g)
Per 100 g: 46 mg oxalate
Sodium: 47 mg/100g | Calcium: 44 mg/100g | Protein: 8.1 g/100g

🏆 The Verdict: Choose Lettuce, iceberg

At 1 mg oxalate per serving (rated Safe), Lettuce, iceberg is the clear winner over Potato, Russet (29 mg, Caution). The 29x difference comes from Harvard's 2024 lab measurements — this isn't an estimate or guess. Build your meals around Lettuce, iceberg and use Potato, Russet sparingly, if at all.

🔍 Key Takeaways

**Oxalate gap:** 29 mg vs 1 mg per serving — a 29x difference. One of these is significantly easier to fit into a kidney stone diet.
**Verdicts:** Potato, Russet is rated **Caution (25-99 mg/serving)**; Lettuce, iceberg is rated **Safe (under 25 mg/serving)**.
**Serving strategy:** If you choose Potato, Russet, consider a half portion or pair it with a calcium source. Lettuce, iceberg can be eaten more freely.
**Cooking tip:** For either vegetable, boiling and discarding the cooking water can reduce soluble oxalate by 30-50%. Steaming or eating raw preserves more oxalate.

❓ Frequently Asked Questions

Which is better for kidney stones — Potato, Russet or Lettuce, iceberg?

Straight answer: Lettuce, iceberg. With 1 mg oxalate per serving (Safe), it's significantly safer than Potato, Russet (29 mg, Caution). The 29x gap is measured by Harvard's 2024 lab analysis, not estimates. Pick Lettuce, iceberg for daily eating, save Potato, Russet for occasional use.

Can I eat Potato, Russet and Lettuce, iceberg together?

It's doable, but portion size matters a lot. Together they'd run about 30 mg oxalate. Use Lettuce, iceberg as your base and treat Potato, Russet as a garnish or small side — that keeps the total oxalate manageable.

How should I prepare Potato, Russet vs Lettuce, iceberg differently?

For Potato, Russet, boiling and draining cuts oxalate by 30-50%. Steaming preserves more. For Lettuce, iceberg, preparation method matters less — it's already low-oxalate. If you're cooking both, boil Potato, Russet separately and discard the water.

What are good substitutes if I want to avoid Potato, Russet?

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

Browse all Vegetables 🟢 Low Oxalate Foods Lettuce, iceberg page Potato, Russet 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.