🔴🥛 High Oxalate + High Calcium Foods — Kidney Stone Risk Analysis
Double-risk foods are in a category of their own. These 9 items trigger two independent stone-promoting mechanisms at once — which makes them worth paying special attention to in a kidney stone diet.
📊 9 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:** 9 foods (100%) are rated Avoid. Focus on the 0 safe options to minimize risk.
**Double risk:** These 9 foods trigger two independent kidney stone risk mechanisms simultaneously. While neither factor alone guarantees stone formation, the combination deserves heightened awareness in a kidney stone diet.
**Average oxalate:** 249 mg/serving across all 9 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 "🔴"} 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
{"🟢" 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
What makes a food 'double risk'?
A double-risk food hits two independent kidney stone risk factors at once — for example, high oxalate AND high sodium. Each factor alone raises stone risk. Together, the concern is amplified. This page identifies foods where both conditions apply.
Should I completely avoid double-risk foods?
Not necessarily. These foods deserve more attention than single-risk foods, but occasional small portions may be acceptable depending on your overall diet. Talk to your doctor or dietitian about your specific situation.
How common are double-risk foods?
Relatively uncommon — which is why they're worth flagging. Most foods have one dominant risk factor, not two. When a food hits both, it's worth knowing about.
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.