Kidney beans

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Here's another normally healthy food that can be dangerous if eaten the wrong way. Red kidney beans are packed with protein, fiber, and antioxidants, but eating them raw can wreak havoc on your stomach. "Uncooked kidney beans contain the toxin phytohemagglutinin, which can cause unpleasant gastrointestinal discomfort and symptoms similar to food poisoning," says Dr. Davis. Make sure you boil kidney beans for at least ten minutes before eating them. Here are some more health benefits (and risks) of eating beans of all types.