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

Grains, Rice, Black, cooked 30 min

🟢 Safe — Low Oxalate
9 mg oxalate / serving
Serving: 1/2 cup (70 g) | Per 100 g: 13 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

9 mg
Oxalate / serving
Low Oxalate
0 mg
Sodium / 100g
Low Na
7.6 g
Protein / 100g
Tier 1
14 mg
Calcium / 100g
Tier 1

📏 Oxalate by Serving Size

ServingWeightOxalateVerdict
1/2 cup70 g9 mg Safe
2 x 1/2 cup140 g18 mg Safe
½ x 1/2 cup35 g4.5 mg Safe

🏷️ Tags

Grains & Pasta 🟢 Oxalate Safe Low Oxalate Plant-Based

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

🔗 Related Foods

❓ Frequently Asked Questions

Should I avoid Grains if I have kidney stones?

Safe pick. 9 mg oxalate per 1/2 cup means Grains 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 Grains?

The exact figure: 9 mg of oxalate per 1/2 cup of Grains. Works out to 13 mg/100g. This is the number kidney stone patients actually need. Harvard (2024) verified.

Is Grains high in oxalates?

Nope. Grains is a low-oxalate food — just 9 mg per 1/2 cup. Well under the 25 mg cutoff. You're in the clear with this one.

What can I eat instead of Grains?

Don't give up the whole category — just pick a safer member of it. The green foods in the related section all work as substitutes for Grains with a fraction of the oxalate.

How much sodium does Grains have?

The sodium level is fine — 0 mg/100g. If all your foods looked like this on sodium, you'd be in great shape for stone prevention.

🔍 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.