Spinach is very high per serving, but all sorts of foods can have high oxalates per serving. Sweet potato, Swiss chard, almonds, beets, chocolate. You'd have to

Spinach is very high per serving, but all sorts of foods can have high oxalates per serving. Sweet potato, Swiss chard, almonds, beets, chocolate. You'd have to consult the content per serving for all foods you consume if you're trying to avoid them.