Home › Compare › Potato, Russet vs Lettuce, romaine

🟢 Lettuce, romaine VS 🟡 Potato, Russet

The oxalate gap between these two is hard to ignore. Potato, Russet at 29 mg per serving vs Lettuce, romaine at 1 mg — 29x more. One is a daily option, the other requires careful consideration.

✓ 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, romaine
Safe — Low Oxalate
1 mg oxalate / serving
Serving: 1 cup shredded (47 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, romaine

At 1 mg oxalate per serving (rated Safe), Lettuce, romaine 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, romaine 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, romaine 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, romaine 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, romaine?

Lettuce, romaine is the clear winner. At 1 mg oxalate per serving, it's rated Safe — compared to Potato, Russet's 29 mg. That's a 29x difference. If you're managing kidney stones, Lettuce, romaine is the safer everyday choice. But Potato, Russet isn't permanently off-limits — just be aware of portions and frequency.

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

Yes, but watch your portions. Combined, you're looking at roughly 30 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 Potato, Russet vs Lettuce, romaine differently?

For Potato, Russet, boiling and draining cuts oxalate by 30-50%. Steaming preserves more. For Lettuce, romaine, 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?

The obvious swap is Lettuce, romaine — same food category, 29x less oxalate. You can also browse the Vegetables category on OxalateWatch for other 🟢 Safe options. The key is sticking with foods rated Safe (under 25 mg/serving).

Browse all Vegetables 🟢 Low Oxalate Foods Lettuce, romaine 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.