🟢 Safe
Oxalate <25 mg/serving
🟡 Caution
Oxalate 25-99 mg/serving
🔴 Avoid
Oxalate ≥100 mg/serving
🟡

Eggplant, raw, boiled, baked or roasted

🟡 Caution — Moderate
26 mg oxalate / serving
Serving: 1/2 cup (42 g) | Per 100 g: 62 mg
✓ Medically Reviewed Content reviewed by OxalateWatch Editorial Team. Based on Harvard T.H. Chan SPH oxalate data (2024) and NKF/AUA dietary guidelines.

Eggplant is another nightshade that gets caught in anti-nightshade discourse. The oxalate reality: 26 mg per half-cup — just over the 25 mg safe line, putting it in Caution territory. The skin contains most of the oxalate. Peeling helps. Eggplant parmesan is actually better for you than plain fried eggplant because the cheese adds protective calcium. Baba ganoush, ratatouille, grilled slices — all fine in normal portions. Just don't make it your primary vegetable every day.

📊 Nutrition at a Glance

26 mg
Oxalate / serving
Moderate
0 mg
Sodium / 100g
Low Na
0.9 g
Protein / 100g
Tier 1
11 mg
Calcium / 100g
Tier 1

📏 Oxalate by Serving Size

ServingWeightOxalateVerdict
1/2 cup42 g26 mg Caution
2 x 1/2 cup84 g52 mg Caution
½ x 1/2 cup21 g13 mg Safe

🏷️ Tags

Vegetables Moderate Oxalate 🟡 Oxalate Caution

🟡 See all Vegetables rated Caution for kidney stones →

⚖️ Compare this food: · vs Pumpkin · vs Radish

🔗 Related Foods

❓ Frequently Asked Questions

Should I avoid Eggplant if I have kidney stones?

Yellow zone. 26 mg per 1/2 cup means Eggplant sits in that middle ground where it's manageable but not risk-free. Half portions help. So does eating it less often.

What's the oxalate content of Eggplant?

One 1/2 cup of Eggplant = 26 mg oxalate. Scale it up to 100g and you're at 62 mg. Direct measurement from Harvard, 2024. About as reliable as food data gets.

Is Eggplant a high-oxalate food?

Moderate. Eggplant has 26 mg oxalate per 1/2 cup — not high enough to panic, not low enough to ignore. Portions matter with this one.

What can I eat instead of Eggplant?

Plenty of options. Scroll down to Related Foods — every 🟢 green item there is a lower-oxalate alternative to Eggplant. Same food group, way less oxalate.

How much sodium does Eggplant have?

0 mg sodium per 100g in Eggplant. Well under the 460 mg threshold. One less thing on your kidney stone checklist.

How much Eggplant is safe to eat?

Size matters. 1/2 cup of Eggplant = 26 mg. Cut it in half, you're at roughly 13 mg. If you love this food, the half-portion strategy is your best compromise.

🔍 Explore More About This Food

📚 Data Sources

Oxalate: Harvard T.H. Chan School of Public Health (2024) via OHF. Nutrition: USDA FoodData Central (SR Legacy 2018 & Foundation Foods).

📖 Key Scientific References

Taylor EN, Curhan GC. Oxalate intake and the risk for nephrolithiasis. J Am Soc Nephrol. 2007;18(7):2198-2204. PMID: 17538185
Borghi L, Schianchi T, Meschi T, et al. Comparison of two diets for the prevention of recurrent stones in idiopathic hypercalciuria. N Engl J Med. 2002;346(2):77-84. DOI: 10.1056/NEJMoa010369
Fink HA, Akornor JW, Garimella PS, et al. Diet, fluid, or supplements for secondary prevention of nephrolithiasis. Eur Urol. 2009;56(1):72-80. DOI: 10.1016/j.eururo.2009.03.031
Ferraro PM, Taylor EN, Gambaro G, Curhan GC. Dietary and lifestyle factors for primary prevention of nephrolithiasis. BMC Nephrol. 2020;21(1):267. PMID: 32652950
Pearle MS, Goldfarb DS, Assimos DG, et al. Medical management of kidney stones: AUA guideline. J Urol. 2014;192(2):316-324. DOI: 10.1016/j.juro.2014.05.006
Liebman M, Costa G. Effects of calcium and magnesium on urinary oxalate excretion after oxalate loads. J Urol. 2000;163(5):1565-1569. PMID: 10751889
Holmes RP, Assimos DG. The impact of dietary oxalate on kidney stone formation. Urol Res. 2004;32(5):311-316. DOI: 10.1007/s00240-004-0437-3
Lin BB, Lin ME, Huang RH, et al. Dietary treatment and fluid intake for prevention of recurrent calcium stones. PLoS One. 2021;16(4):e0250257. PMID: 33872340
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.