Red beans and white beans are poisonous. Raw red and white knife beans are poisonous, is called colchicine toxin, high temperature will destroy this toxin, burned cooked is not poisonous. The toxins contained in snapdragons are saponins, saponins, and collagenase inhibitors, which can cause stomach swelling and bleeding. But as long as heated to more than 100 degrees, thoroughly cooked, the toxins will be destroyed.