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

Cereal, Grape-Nuts Flakes, Post

🟡 Caution — Moderate
25 mg oxalate / serving
Serving: 1 cup (43 g) | Per 100 g: 57 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

25 mg
Oxalate / serving
Moderate
465 mg
Sodium / 100g
High Na
11.2 g
Protein / 100g
Tier 1
32 mg
Calcium / 100g
Tier 1

🚨 High Sodium Alert

Cereal contains 465 mg sodium per 100g — well above the recommended limit for kidney stone patients. High sodium intake can increase calcium in urine, raising stone risk.

📏 Oxalate by Serving Size

ServingWeightOxalateVerdict
1 cup43 g25 mg Caution
2 x 1 cup86 g50 mg Caution
½ x 1 cup21 g12.5 mg Safe

🏷️ Tags

Grains & Pasta Plant-Based Moderate Oxalate 🟡 Oxalate Caution High Sodium Processed Food

🟡 See all Grains & Pasta rated Caution for kidney stones →

🔗 Related Foods

❓ Frequently Asked Questions

Should I avoid Cereal if I have kidney stones?

It's not off-limits, but keep an eye on portions. Cereal has 25 mg oxalate per 1 cup — that's in the caution zone (25-99 mg). Eat it, just don't make it a daily thing.

How much oxalate is in Cereal?

25 mg — that's the oxalate in a standard 1 cup of Cereal. For the 100g comparison freaks: 57 mg. Source is Harvard's 2024 food analysis project.

Is Cereal a high-oxalate food?

It's in the moderate range. 25 mg per 1 cup sits between safe and high-risk. Manageable if you watch how much you eat.

What are the best low-oxalate alternatives to Cereal?

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 Cereal. Pick from those.

Is Cereal high in sodium?

465 mg sodium per 100g — that's elevated. For kidney stone patients, sodium is a sneaky risk factor. It increases urinary calcium. Watch this one.

How much Cereal is safe to eat?

Size matters. 1 cup of Cereal = 25 mg. Cut it in half, you're at roughly 12.5 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.