Because when cooking beans, you need to heat them until they are ripe to destroy their toxins. If they are not ripe, people may be poisoned if they eat them.

Both saponin from lentil skin and hemagglutinin from beans can strongly stimulate gastrointestinal tract. Saponin, also known as saponin, is itself a toxic protein; The two ends of beans, pod filaments and old lentils contain the most toxins.

Hong Zhongxin, the chief physician of the Nutrition Department of Beijing Friendship Hospital, suggested in an interview with Health News that heating lentils evenly to 100℃ and cooking them on low heat for 30 minutes can effectively destroy the toxic substances in them.

Symptoms and treatment of extended data poisoning

After eating uncooked and thoroughly cooked lentils, nausea, vomiting, abdominal pain and burning sensation in the stomach will occur in a few minutes to 2-4 hours. In severe cases, symptoms such as numbness of limbs, chest tightness and hematemesis may occur.

Once lentil poisoning occurs, the mild person should immediately induce vomiting, drink a lot of warm water quickly every time, then gently probe the throat with your index finger or chopsticks to stimulate the laryngeal nerve to induce vomiting, and so on for many times until the vomit is clear water. People with severe poisoning should be sent to hospital for treatment in time if they vomit repeatedly, causing severe dehydration or suffocation.

References:

Qilu. com "Will eating beans be poisoned? Actually, it's because the beans are not completely cooked.

People's Daily Online "Weekly First Aid Topic: Beware of Lentil Poisoning"