9 High-Oxalate Foods That May Increase Kidney Stone Risk

High-oxalate foods can contribute to calcium oxalate kidney stones when consumed in excess. Here are some common foods to watch:

1. Spinach – Extremely high in oxalates; a major contributor to stone formation.
2. Almonds & Nuts – Almonds, cashews, and peanuts can quickly raise oxalate levels.
3. Beets – A root vegetable known to increase urinary oxalate.
4. Sweet Potatoes – Nutritious but high in oxalates—best in moderation.
5. Chocolate – Contains oxalates and sugar, both linked to higher stone risk.
6. Rhubarb – Very high in oxalates; should be limited.
7. Black Tea – A common beverage with significant oxalate content.
8. Soy Foods – Tofu, soy milk, and soybeans are notable oxalate sources.
9. Bran & Whole Grains – Wheat bran and bran cereals can contribute to oxalate intake.

Tip: Balance your diet, stay hydrated, and pair high-oxalate foods with calcium-rich options to help reduce stone risk.