These are the long-term effects of avocados on our kidneys—and not everyone tells you.

Oxalates: The Overlooked Risk

Avocados also contain oxalates—compounds that bind calcium and form kidney stones. At 19 mg per fruit, the level is much lower than spinach (970 mg), but still relevant for stone-prone individuals. A 2024 Clinical Nutrition study found that eating 2–3 avocados daily raised stone risk by 12% across seven years. Adequate hydration (2–3 liters daily) helps offset this.