Cooked string beans are not poisonous. However, if in the cooking process, the four season beans are not fully cooked, consumption may cause poisoning.
Our daily life said “vegetable beans” is the four season beans, normally cooked under the circumstances will not cause poisoning, if the phenomenon of poisoning, may be due to phytohaemagglutinin, saponin, trypsin inhibitors, not cooked four season beans in the content of such substances is relatively high, this material on the human digestive mucosa has a strong irritating effect. The content of these substances is high in undercooked beans, and these substances have a strong irritating effect on the mucous membrane of the human digestive tract.
Eating undercooked beans, the main symptoms of poisoning are abdominal pain, diarrhea, nausea, vomiting and other gastrointestinal symptoms. Or accompanied by headache, dizziness, chest tightness, panic, cold sweat and so on. Depending on the poisoning and physical condition, the poisoning condition lasts for a few hours or 1 to 2 days. Once poisoned, it is recommended to go to the hospital for symptomatic treatment.
The main measures to prevent poisoning are: cook the beans well, high temperature can destroy the plant blood cell agglutinin, trypsin inhibitor, etc., cooked beans, in the consumption of raw taste and bitter hardness is also much less.