Cocoa Powder
Cocoa powder and the more common dark chocolate are extraordinary additions to your diets in moderation since they add antioxidants to your diet that help you fight free radicals that damage your cells.
The downside is that cacao has high amounts of oxalates that bind with minerals like calcium to form kidney stones.
Eat low sugar dark chocolate in moderation and only avoid it if you have renal dysfunction or are developing kidney stones.