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🟢 Lettuce, butterhead VS 🟡 Eggplant

Let's be clear: Eggplant is the much safer choice here. At just 26 mg oxalate per serving, it's solidly in the safe zone — compared to Lettuce, butterhead'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, butterhead
Safe — Low Oxalate
1 mg oxalate / serving
Serving: 1 cup shredded (55 g)
Per 100 g: 0 mg oxalate
Sodium: — | Calcium: — | Protein: —
🟡
Eggplant
Caution — Moderate Oxalate
26 mg oxalate / serving
Serving: 1/2 cup (42 g)
Per 100 g: 62 mg oxalate
Sodium: 0 mg/100g | Calcium: 11 mg/100g | Protein: 0.9 g/100g

🏆 The Verdict: Choose Lettuce, butterhead

At 1 mg oxalate per serving (rated Safe), Lettuce, butterhead is the clear winner over Eggplant (26 mg, Caution). The 26x difference comes from Harvard's 2024 lab measurements — this isn't an estimate or guess. Build your meals around Lettuce, butterhead and use Eggplant sparingly, if at all.

🔍 Key Takeaways

**Oxalate gap:** 26 mg vs 1 mg per serving — a 26x difference. One of these is significantly easier to fit into a kidney stone diet.
**Verdicts:** Eggplant is rated **Caution (25-99 mg/serving)**; Lettuce, butterhead is rated **Safe (under 25 mg/serving)**.
**Serving strategy:** If you choose Eggplant, consider a half portion or pair it with a calcium source. Lettuce, butterhead 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 — Eggplant or Lettuce, butterhead?

The numbers leave no doubt: Lettuce, butterhead (1 mg oxalate/serving, Safe) beats Eggplant (26 mg, Caution) by a factor of 26x. For kidney stone patients, Lettuce, butterhead is the pick. Eggplant is a food to approach with portion awareness.

Can I eat Eggplant and Lettuce, butterhead together?

Yes, but watch your portions. Combined, you're looking at roughly 27 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 Eggplant vs Lettuce, butterhead differently?

Boil and drain Eggplant to cut oxalate. Lettuce, butterhead can be prepared any way — it's already in the safe zone regardless of cooking method. If making a dish with both, prepare them separately so you can boil the higher-oxalate one.

What are good substitutes if I want to avoid Eggplant?

Your best bet: Lettuce, butterhead. It's in the same category and has dramatically less oxalate. Check the Related Foods section on Eggplant's page for more specific alternatives verified by Harvard's 2024 data.

Browse all Vegetables 🟢 Low Oxalate Foods Lettuce, butterhead page Eggplant 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.