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

Fries, French (Multiple Fast-Food Restaurants)

🟡 Caution — Moderate
30 mg oxalate / serving
Serving: (100 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

30 mg
Oxalate / serving
Moderate
Sodium / 100g
Pending
Protein / 100g
Pending
Calcium / 100g
Pending

📏 Oxalate by Serving Size

ServingWeightOxalateVerdict
100 g30 mg Caution
2 x 200 g60 mg Caution
½ x 50 g15 mg Safe

🏷️ Tags

Grains & Pasta 🟡 Oxalate Caution Moderate Oxalate Processed Food

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

⚖️ Compare this food: · vs White whole wheat flour · vs Corn

🔗 Related Foods

❓ Frequently Asked Questions

Is Fries safe for kidney stones?

It's not off-limits, but keep an eye on portions. Fries has 30 mg oxalate per — that's in the caution zone (25-99 mg). Eat it, just don't make it a daily thing.

How much oxalate is in Fries?

30 mg — that's the oxalate in a standard of Fries. For the 100g comparison freaks: 0 mg. Source is Harvard's 2024 food analysis project.

Is Fries low or high oxalate?

Moderate. Fries has 30 mg oxalate per — not high enough to panic, not low enough to ignore. Portions matter with this one.

What can I eat instead of Fries?

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 Fries with a fraction of the oxalate.

How reliable is the data for Fries?

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.

How much Fries is safe to eat?

The portion math: = 30 mg oxalate. Half serving = ~15 mg. With a 100 mg daily oxalate target, 30 mg from one food eats a big chunk of your budget. Go smaller.

🔍 Explore More About This Food

📚 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.