🍳 Oxalate After Boiling

Foods where boiling can reduce oxalate. Based on Harvard T.H. Chan SPH oxalate data (2024).

32 foods in this collection

✓ Medically Reviewed Content reviewed by OxalateWatch editorial team. Based on Harvard T.H. Chan SPH oxalate data (2024) and NKF/AUA dietary guidelines.

🟢 Safe
0 foods
0%

🟡 Caution
0 foods
0%

🔴 Avoid
32 foods
100%

🍽️ Foods in This Collection

🔴 Good King Henry

110 mg oxalate / serving

Avoid

🔴 Good King Henry

228 mg oxalate / serving

Avoid

🔴 Huazontle (Aztec broccoli)

263 mg oxalate / serving

Avoid

🔴 Mangold or Spinach beet

590 mg oxalate / serving

Avoid

🔴 Nopal (Prickly Pear)

226 mg oxalate / serving

Avoid

🔴 Purslane

248 mg oxalate / serving

Avoid

🔴 Sorrel

303 mg oxalate / serving

Avoid

🔴 Sorrel

405 mg oxalate / serving

Avoid

🔴 Spinach

493 mg oxalate / serving

Avoid

🔴 Swiss Chard

293 mg oxalate / serving

Avoid

🔴 Swiss Chard

237 mg oxalate / serving

Avoid

🔴 Swiss Chard

594 mg oxalate / serving

Avoid

🔴 Swiss Chard

420 mg oxalate / serving

Avoid

🔴 Taro Leaves

183 mg oxalate / serving

Avoid

🔴 Berries

105 mg oxalate / serving

Avoid

🔴 Cactus

131 mg oxalate / serving

Avoid

🔴 Pomegranate

110 mg oxalate / serving

Avoid

🔴 Rhubarb

1293 mg oxalate / serving

Avoid

🔴 Star Fruit or Carambola

269 mg oxalate / serving

Avoid

🔴 Cereal

103 mg oxalate / serving

Avoid

🔴 Cereals

105 mg oxalate / serving

Avoid

🔴 Flour

197 mg oxalate / serving

Avoid

🔴 Nuts

107 mg oxalate / serving

Avoid

🔴 Almonds =

165 mg oxalate / serving

Avoid

🔴 Juice

1990 mg oxalate / serving

Avoid

🔴 Juice

496 mg oxalate / serving

Avoid

🔴 Juice

485 mg oxalate / serving

Avoid

🔴 Juice

164 mg oxalate / serving

Avoid

🔴 Condiments

103 mg oxalate / serving

Avoid

🔴 Seeds

114 mg oxalate / serving

Avoid

🔴 Crackers

115 mg oxalate / serving

Avoid

🔴 Beet Powder

100 mg oxalate / serving

Avoid

❓ Frequently Asked Questions

How many foods are in this category?

There are 32 foods in this category in our database, all with oxalate data from Harvard T.H. Chan SPH (2024).

Are these foods generally safe for kidney stones?

It depends on the specific food — even within a category, oxalate levels vary widely. Some are very safe, others need caution. Check individual food pages for specific numbers.

Which foods in this category should I avoid?

Scan for the 🔴 markers below. These are the high-oxalate foods in this category. But keep in mind — one high-oxalate food doesn't mean the whole category is off-limits.

How should I prepare these foods?

Preparation method matters. Boiling and draining can reduce oxalate in many vegetables. Steaming and roasting have less effect. Check individual food pages for specific tips.

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.