Are lectins bad for you? No, and here’s why. First of all, lectins are destroyed in cooking, so when you cook grains or beans, it destroys the lectins and they can't hurt you. Second of all, there are people online, talking about lectins being harmful. And what they're not telling you is that the healthiest, longest living populations of people around the world actually consume the most beans! That's right, beans and whole grains are staple foods in the healthiest, longest living populations. So