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

Garlic, raw

🟢 Safe — Low Oxalate
0 mg oxalate / serving
Serving: 1 clove (3 g) | Per 100 g: 9 mg
✓ Medically Reviewed Content reviewed by OxalateWatch Editorial Team. Based on Harvard T.H. Chan SPH oxalate data (2024) and NKF/AUA dietary guidelines.

Like onions, garlic is negligible in oxalate and used in such small quantities as a flavor base that the actual oxalate contribution to a meal rounds to zero. The health benefits of garlic (allicin compounds, potential cardiovascular and antimicrobial effects) are well-studied though modest in real-world dietary amounts. For kidney stone purposes, garlic is simply a flavor tool you can use without thinking about oxalate. Roast whole cloves until soft and spreadable. Mince fresh into sauces and marinades. Use garlic powder in dry rubs. All forms — raw, cooked, powdered — are oxalate-safe. The only thing to watch: garlic salt adds sodium. Use garlic powder or fresh garlic instead.

📊 Nutrition at a Glance

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

📏 Oxalate by Serving Size

ServingWeightOxalateVerdict
1 clove3 g0 mg Safe
2 x 1 clove6 g0 mg Safe
½ x 1 clove1 g0 mg Safe

🏷️ Tags

Vegetables 🟢 Oxalate Safe Low Oxalate Plant-Based

🟢 See all Vegetables rated Safe for kidney stones →

🔗 Related Foods

❓ Frequently Asked Questions

Should I avoid Garlic if I have kidney stones?

Yep, you're good. Garlic clocks in at 0 mg oxalate per 1 clove — way under the 25 mg cutoff. Eat it without the stress. Measured by Harvard, not guessed.

What's the oxalate content of Garlic?

Quick math: 1 clove of Garlic = 0 mg oxalate. 100g = 9 mg. Both numbers come from Harvard's latest lab measurements. Not AI, not a database, actual lab work.

Is Garlic low or high oxalate?

Low. 0 mg per 1 clove puts Garlic firmly in the low-oxalate category. Safe for regular eating if you're managing kidney stones.

What are the best low-oxalate alternatives to Garlic?

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 Garlic. Pick from those.

How reliable is the data for Garlic?

The oxalate number for Garlic — 0 mg per serving — is from Harvard's 2024 lab analysis. That part is solid. The USDA nutrition data (sodium, protein, calcium) is still being matched — we'll update when it's available.

🔍 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.