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

Summer squash, boiled

🟢 Safe — Low Oxalate
1 mg oxalate / serving
Serving: 1 cup sliced (180 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

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

📏 Oxalate by Serving Size

ServingWeightOxalateVerdict
1 cup sliced180 g1 mg Safe
2 x 1 cup sliced360 g2 mg Safe
½ x 1 cup sliced90 g0.5 mg Safe

🏷️ Tags

Vegetables 🟢 Oxalate Safe Low Oxalate Plant-Based

🟢 See all Vegetables rated Safe for kidney stones →

⚖️ Compare this food: · vs Potato · vs Celery

🔗 Related Foods

❓ Frequently Asked Questions

Is Summer squash safe for kidney stones?

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

How much oxalate is in Summer squash?

The exact figure: 1 mg of oxalate per 1 cup sliced of Summer squash. Works out to 0 mg/100g. This is the number kidney stone patients actually need. Harvard (2024) verified.

Is Summer squash low or high oxalate?

It's low. 1 mg per 1 cup sliced is well under the 25 mg danger line. Summer squash is not the food you need to worry about.

What are the best low-oxalate alternatives to Summer squash?

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

How reliable is the data for Summer squash?

The 1 mg oxalate figure is direct from Harvard's lab — measured, not estimated. The sodium/protein/calcium numbers aren't fully matched yet. When they are, we'll update.

🔍 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.