🥛 Calcium-Rich Vegetables — Protective Foods for Kidney Stones
Don't avoid calcium — that's outdated advice. The NKF and AUA both recommend getting enough dietary calcium (from food, not pills). These 46 Vegetables foods deliver 100+ mg/100g, helping trap oxalate in your digestive tract.
📊 46 foods
Content reviewed by OxalateWatch editorial team. Based on Harvard T.H. Chan SPH oxalate data (2024) and NKF/AUA dietary guidelines.
**Majority safe:** 38/46 foods (82%) are in the safe range. The odds are in your favor with this intersection.
**Average calcium:** 700 mg/100g. The recommended daily intake is 1,000-1,200 mg. These foods help you get there from food — the preferred source.
**Average oxalate:** 43 mg/serving across all 46 foods. Check individual food pages for precise numbers per serving size.
**Data source:** All oxalate values from Harvard T.H. Chan SPH (2024) via OHF. Nutrition data from USDA FoodData Central where available.
🍽️ Foods in This Category
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Seaweed
0 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Seaweed
0 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Spirulina
0 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Arugula
1 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
1 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
1 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
1 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Turnip
2 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
2 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
2 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
2 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
2 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
2 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
2 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
3 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
3 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
3 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
3 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
3 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
3 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
3 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Watercress
4 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
4 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
4 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
4 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Turnip Greens
6 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
6 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
6 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Kelp
6 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
8 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
8 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Dandelion greens
10 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
10 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
12 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Seaweed
14 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
17 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Collards
21 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
23 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
32 mg / serving
Caution
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Herbs and Spices
46 mg / serving
Caution
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Basil Wraps
60 mg / serving
Caution
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Roselle (Red Sorrel - Hibiscus Sabdariffa)
95 mg / serving
Caution
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Swiss Chard
237 mg / serving
Avoid
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Swiss Chard
293 mg / serving
Avoid
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Swiss Chard
420 mg / serving
Avoid
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Swiss Chard
594 mg / serving
Avoid
❓ Frequently Asked Questions
Should I avoid calcium if I have calcium oxalate stones?
No — that's outdated advice. Dietary calcium actually binds oxalate in your gut, reducing absorption. Aim for 1,000-1,200 mg from food, not supplements.
What's the difference between food calcium and supplement calcium?
Calcium from food is protective — it binds oxalate in your digestive tract. Calcium supplements taken between meals may actually increase stone risk. Get calcium from food when possible.
How much calcium do I need?
The NKF recommends 1,000-1,200 mg of dietary calcium daily. The foods on this page help you get there from real food sources.
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.