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

cornstarch

🟢 Safe — Low Oxalate
0 mg oxalate / serving
Serving: (8 g) | Per 100 g: 0 mg
✓ Medically Reviewed Content reviewed by OxalateWatch Editorial Team. Based on Harvard T.H. Chan SPH oxalate data (2024) and NKF/AUA dietary guidelines.

📊 Nutrition at a Glance

0 mg
Oxalate / serving
Low Oxalate
—
Sodium / 100g
Pending
—
Protein / 100g
Pending
—
Calcium / 100g
Pending

📏 Oxalate by Serving Size

ServingWeightOxalateVerdict
8 g0 mg Safe
2 x 16 g0 mg Safe
½ x 4 g0 mg Safe

🏷️ Tags

Grains & Pasta 🟢 Oxalate Safe Low Oxalate Plant-Based

🟢 See all Grains & Pasta rated Safe for kidney stones →

🔗 Related Foods

🟢 Safe alternatives (recommended)

🟢
Corn Syrup
0 mg oxalate/serving
 🟢
Corn
0 mg oxalate/serving
 🟢
Licorice DGL
0 mg oxalate/serving
 🟢
Corn oil
0 mg oxalate/serving

⚠️ Other foods in this category to watch

🔴
Cereals
105 mg oxalate/serving
 🔴
Cereal
103 mg oxalate/serving
 🟡
Flour
84 mg oxalate/serving
 🟡
(TVP)
77 mg oxalate/serving

❓ Frequently Asked Questions

Is cornstarch safe for kidney stones?

Safe pick. 0 mg oxalate per means cornstarch is comfortably in the green zone. Harvard's 2024 lab data says so. No need to track this one obsessively.

How much oxalate is in cornstarch?

Here are the numbers: 0 mg oxalate in one of cornstarch (8g). Per 100 grams, that's 0 mg. Harvard T.H. Chan SPH did the lab work (2024) — these aren't database guesses.

Is cornstarch low or high oxalate?

Low. 0 mg per puts cornstarch firmly in the low-oxalate category. Safe for regular eating if you're managing kidney stones.

What can I eat instead of cornstarch?

Look at the 'Safe Alternatives' section right below this FAQ. Those foods are all under 25 mg oxalate per serving and in the same category as cornstarch. Pick from those.

How reliable is the data for cornstarch?

Oxalate: very reliable (Harvard 2024 lab measurement). Other nutrients: still being matched to USDA data. The oxalate figure is what matters for a kidney stone decision, and that one's solid.

🔍 Explore More About This Food

🟢See our detailed safety analysis for this food 📊Exact oxalate numbers: how much is in a serving 📋Low, moderate, or high oxalate? Full breakdown

📚 Data Sources

Oxalate: Harvard T.H. Chan School of Public Health (2024) via OHF.

📖 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.