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

Flour, Buckwheat

🟡 Moderate Oxalate — Moderate
84 mg oxalate / serving
Serving: 1/4 cup (30 g) | Per 100 g: 280 mg
✓ Lab-Verified Data Oxalate values from Harvard T.H. Chan SPH Oxalate Database (2024), measured via ion chromatography. This site is a dietary reference tool, not a medical resource.

📊 Nutrition at a Glance

84 mg
Oxalate / serving
Moderate
0 mg
Sodium / 100g
Low Na
8.9 g
Protein / 100g
Tier 1
30 mg
Calcium / 100g
Tier 1

Flavor variants in a product family share the base profile, and the oxalate table follows the base more than the flavoring. Buckwheat Flour measures 84 mg per serving, in the middle of the family range. The useful reading is the family spread: if the range is narrow, flavor choice is free; if it is wide, the flavor with the lower measured value is the easy win. Related forms in this family: Teff Flour (Teff) (75 mg), Almond Meal Flour (197 mg), Amaranth Flour (74 mg).

📏 Oxalate by Serving Size

ServingWeightOxalateVerdict
1/4 cup30 g84 mg Moderate Oxalate
2 x 1/4 cup60 g168 mg High Oxalate
½ x 1/4 cup15 g42 mg Moderate Oxalate

🏷️ Tags

Grains & Pasta Plant-Based Moderate Oxalate 🟡 Oxalate Caution

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

⚖️ Compare this food: · vs Sweet rice flour (mochiko)

🔗 Related Foods

❓ Frequently Asked Questions

Is Flour safe for kidney stones?

You can have it. Just be aware that at 84 mg oxalate per 1/4 cup, Flour isn't in the all-clear zone. Think 'sometimes food,' not 'everyday food.'

How much oxalate is in Flour?

The lab result: 84 mg per 1/4 cup (30g serving). That's 280 mg per 100g. Harvard's ion chromatography analysis, 2024. Not crowdsourced, not estimated.

Is Flour a high-oxalate food?

Middle of the pack. 84 mg oxalate per 1/4 cup puts Flour in the moderate zone. Fine occasionally, not an everyday food.

What are the best low-oxalate alternatives to Flour?

Substitutes exist. The safe alternatives listed below are all low-oxalate foods in the same family as Flour. Grab one of those and you dodge the oxalate while keeping similar flavors.

How much Flour is safe to eat?

Size matters. 1/4 cup of Flour = 84 mg. Cut it in half, you're at roughly 42 mg. If you love this food, the half-portion strategy is your best compromise.

How much sodium does Flour 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.