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Here’s another one: In the past, people prone to kidney stones have been told to avoid high-oxalate foods, like spinach, rhubarb or peanuts. But those foods can be good for us in other ways ...
High-oxalate foods (a.k.a. sneaky stone builders) Spinach, beets, sweet potatoes, chocolate, nuts, and black tea—these guys are loaded with oxalates, which can team up with calcium to form stones.