Oxalate <25 mg/serving
Oxalate 25-99 mg/serving
Oxalate ≥100 mg/serving
📊 Nutrition at a Glance
📏 Oxalate by Serving Size
| Serving | Weight | Oxalate | Verdict |
|---|---|---|---|
| 1/2 cup | 95 g | 21 mg | Safe |
| 2 x 1/2 cup | 190 g | 42 mg | Caution |
| ½ x 1/2 cup | 47 g | 10.5 mg | Safe |
🏷️ Tags
🟢 See all Vegetables rated Safe for kidney stones →
🔗 Related Foods
🟢 Safe alternatives (recommended)
⚠️ Other foods in this category to watch
❓ Frequently Asked Questions
Is Collards safe for kidney stones?
Short answer: yes. Longer answer: at 21 mg per 1/2 cup, Collards is one of the safer things you can eat if you're watching oxalate. Harvard T.H. Chan SPH measured this directly.
How much oxalate is in Collards?
The exact figure: 21 mg of oxalate per 1/2 cup of Collards. Works out to 22 mg/100g. This is the number kidney stone patients actually need. Harvard (2024) verified.
Is Collards a high-oxalate food?
Nope. Collards is a low-oxalate food — just 21 mg per 1/2 cup. Well under the 25 mg cutoff. You're in the clear with this one.
What can I eat instead of Collards?
Don't give up the whole category — just pick a safer member of it. The green foods in the related section all work as substitutes for Collards with a fraction of the oxalate.
How much sodium does Collards have?
The sodium level is fine — 18 mg/100g. If all your foods looked like this on sodium, you'd be in great shape for stone prevention.