Plum tofu contains an alkaloid called saponin, which has a strong stimulating effect on gastrointestinal mucosa, causing local congestion, swelling and hemorrhagic inflammation of gastrointestinal tract. In addition, saponins can also destroy red blood cells and cause hemolytic symptoms. Saponin mainly exists in the skin of plum beans. As long as it is heated above 100℃ and the plum beans are thoroughly cooked, its toxicity can be destroyed. The incubation period of plum bean poisoning is tens of minutes to several hours. The main symptoms of poisoning are enteritis, such as nausea, vomiting, abdominal pain, abdominal pollution, watery stool without purulent blood. Vomiting times ranged from several times to 10 times. Most of the poisoned people have numbness of limbs, burning sensation in the stomach, palpitation and backache. In addition, there are nervous system symptoms such as dizziness, headache, chest tightness, cold sweat and chills. Therefore, plum tofu must be fried and fully heated to destroy its toxin. You can only eat fried plum beans. Hope to adopt!