🥛 Calcium-Rich Nuts & Seeds — 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Don't avoid calcium — that's outdated advice.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 18 Nuts & Seeds foods deliver 100+ mg/100g, helping trap oxalate in your digestive tract.
📊 18 foods
Content reviewed by OxalateWatch editorial team. Based on Harvard T.H. Chan SPH oxalate data (2024) and NKF/AUA dietary guidelines.
**High-risk subset:** 5 foods (27%) are rated Avoid. Focus on the 9 safe options to minimize risk.
**Average calcium:** 278 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:** 52 mg/serving across all 18 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 "🔴"} Flour
2 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Seeds
2 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Seeds
4 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Seeds
6 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Nuts
8 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Chips
9 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Almond butter
9 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Candy
11 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Nuts
12 mg / serving
Safe
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Crackers
34 mg / serving
Caution
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Nuts
38 mg / serving
Caution
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Nuts
52 mg / serving
Caution
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Nuts
53 mg / serving
Caution
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Nuts
107 mg / serving
Avoid
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Seeds
114 mg / serving
Avoid
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Crackers
115 mg / serving
Avoid
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Almonds =
165 mg / serving
Avoid
{"🟢" if f["verdict"]=="safe" else "🟡" if f["verdict"]=="caution" else "🔴"} Flour
197 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.