The bean curd contains a poisonous protein called lectin, and some bean curd contains saponin, two toxins that can be destroyed by decomposition in high temperature. Therefore, the consumption of half raw half cooked beans, can cause poisoning.　　Thoughtful tips Prevention of bean curd poisoning methods: consumption of fully cooked and boiled through the bean curd, especially the collective canteen consumption of bean curd dishes, should be emphasized as food hygiene to implement. The two ends of the bean and both sides of the silk should be removed, because these parts of the toxin content is higher.　　Bean curd poisoning performance: eating uncooked bean curd ten minutes to 4 hours onset, *** food successive onset, more food poisoning degree heavy. The patient nausea, vomiting, abdominal pain, diarrhea; severe dizziness, headache, cold sweat, panic, chest tightness, numbness of the limbs.　　First Aid: Treat mild cases symptomatically and replenish the water lost due to frequent vomiting and diarrhea.　　For those with moderate poisoning, send them to the hospital for treatment. Take emetic, gastric lavage, diuretic, diarrhea, rehydration and other methods of treatment. Generally quickly return to normal, will not cause other effects.