Kidney Beans Eaten Raw. For the best results soak beans in a pot full of cool water overnight at room temperature 1 x research source it apos s a good idea to sort through the beans before hand and rinse them off to remove any dust sediment or tiny pebbles that might have gotten mixed. While many foods are perfectly fine to eat right off the vine or out of the ground red kidney beans are not one of them.
Raw kidney beans contain from 20 000 to 70 000 hau while fully cooked beans contain from 200 to 400 hau. The more you eat the more intense your symptoms will be. Dried kidney beans need to be soaked in water before being boiled and cooked.
Broad beans vicia faba contain 5 to 10 the amount that red kidney beans contain.
Causes of red kidney bean poisoning the main cause is a toxin called phytohaemagglutinin or kidney bean lectin. According to the fda eating as few as 4 5 uncooked kidney beans can cause severe nausea vomiting and diarrhea in 1 3 hours after ingestion. This is a sugar based protein glycoprotein which is found in many types of beans which includes cannellini beans and broad beans. Lectins are thought to exist to discourage animals and other pests from eating the raw beans or seeds of the plant.