Toxic.

Fresh kidney beans contain two toxins, saponins (saponins) and hemocyte lectins.

Consumption of undercooked string beans is prone to food poisoning. The main symptoms are nausea, vomiting, abdominal pain, diarrhea and other gastroenteritis symptoms, accompanied by dizziness, headache, cold sweat, numbness of the limbs, burning sensation in the stomach, panic and back pain.

Precautions

Consumers who eat out should avoid eating the beans if they find that they are still bright green in appearance and smell like beans when they eat them; if you have suspected symptoms of poisoning after eating the beans, please go to a regular medical institution in a timely manner.

Expanded information

1, toxin mechanism

Saponin on the human gastrointestinal tract has a strong irritation, can cause hemorrhagic inflammation, and the red blood cells have a solubilizing effect; hemoglobin has red blood cell agglutination.

2, the correct cooking method

Saponin (saponin) and hemagglutinin these two toxins are not terrible, as long as the heating to 100 ℃ above 10-30 minutes, so that the beans thoroughly cooked, the toxins will be destroyed.

References:

Xinhua "Food and drug supervision department: four seasonal beans not cooked through will cause poisoning"