🥛 Calcium-Rich Nuts & Seeds — Protective Foods for Kidney Stones

Nuts and seeds are the highest-oxalate snack category in the database. Almonds measure around 107 mg per quarter-cup — above the avoid threshold — while walnuts and cashews sit in the moderate range, and chia, sesame, and poppy seeds climb higher still. The trap is that nuts read as 'healthy food,' which makes the oxalate load easy to overlook. The stone-aware pattern: treat nuts as a measured treat rather than a free snack, keep servings to a small handful, and pair them with dairy or another calcium source in the same sitting.

The calcium-stone story is a reversal of intuition: dietary calcium is protective, not harmful. Calcium binds oxalate in the gut, so less reaches the kidneys. The NKF and AUA guidance is to get calcium from food — roughly 1,000-1,200 mg daily — rather than from supplements taken away from meals, since supplement calcium in isolation can move risk the wrong way. This category lists the foods that deliver that protective calcium alongside their oxalate data.

Among the 18 nuts & seeds 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.