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

Oysters, raw

🟢 Safe — Low Oxalate
0 mg oxalate / serving
Serving: 3 oz (85 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

0 mg
Oxalate / serving
Low Oxalate
58 mg
Sodium / 100g
Low Na
16.0 g
Protein / 100g
Tier 1
27 mg
Calcium / 100g
Tier 1

📏 Moderate Animal Protein

Oysters contains animal protein (about 16g per 100g). The AUA recommends limiting non-dairy animal protein to 3 oz (palm-sized) per meal. Reference guide, not an official standard.

📏 Oxalate by Serving Size

ServingWeightOxalateVerdict
3 oz85 g0 mg Safe
2 x 3 oz170 g0 mg Safe
½ x 3 oz42 g0 mg Safe

🏷️ Tags

Seafood 🟢 Oxalate Safe Low Oxalate Animal Protein

🟢 See all Seafood rated Safe for kidney stones →

🔗 Related Foods

❓ Frequently Asked Questions

Should I avoid Oysters if I have kidney stones?

Don't overthink this one. Oysters has 0 mg oxalate per 3 oz. That's solidly safe territory for kidney stones. The number is from Harvard's latest lab work.

What's the oxalate content of Oysters?

0 mg — that's the oxalate in a standard 3 oz of Oysters. For the 100g comparison freaks: 0 mg. Source is Harvard's 2024 food analysis project.

Is Oysters high in oxalates?

Low. 0 mg per 3 oz puts Oysters firmly in the low-oxalate category. Safe for regular eating if you're managing kidney stones.

What can I eat instead of Oysters?

Plenty of options. Scroll down to Related Foods — every 🟢 green item there is a lower-oxalate alternative to Oysters. Same food group, way less oxalate.

How much sodium does Oysters have?

58 mg sodium per 100g in Oysters. Well under the 460 mg threshold. One less thing on your kidney stone checklist.

Does Oysters have a lot of animal protein?

Animal protein alert: Oysters contributes to your daily animal protein load. The connection to stones is real (higher uric acid, lower citrate). Moderation = ~3 oz per meal, not the whole plate.

🔍 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.