🍳 How Boiling Reduces Oxalate in Fruits

Fruit is the stone-friendly part of the produce aisle: most fruits measure under 10 mg of oxalate per serving, and several (banana, melon, apple) sit near zero. The main caveats are berries — which climb into the moderate range — and dried or concentrated forms, where the oxalate of a whole fruit gets packed into a smaller serving. Fruit juice deserves special attention: it concentrates both oxalate and sugar, and the sugar load matters independently for metabolic health. Eating whole fruit, with its water and fiber, is the better pattern for stone prevention than drinking juice.

Cooking changes the oxalate equation more than most people expect. Boiling vegetables and discarding the cooking water removes a meaningful share of soluble oxalate — the reduction varies by food but is frequently in the 30-50% range, and for some greens considerably more. Steaming and roasting remove less because there is no water to carry the oxalate away. For high-oxalate vegetables that would otherwise be avoided, boiling-and-draining can move them into a manageable range.

Among the 2 fruits foods shown here, the list is ranked by oxalate per serving so the safest options are immediately visible — scan the top of the grid for daily staples and treat the lower entries as portion foods.