Potato is a famous potato, which is rich in starch, pectin, protein, potassium, citric acid, vitamin B and C dietary fiber. Eating potatoes regularly to keep healthy potassium in potatoes can prevent hypertension. Because when the human body consumes too much salt, the sodium in the body will be high and the potassium will be insufficient. Potatoes are the most ideal source of potassium. Vitamin C in potatoes not only has a health care effect on brain cells, but also can lower blood cholesterol, make blood vessels elastic and prevent arteriosclerosis. When potatoes germinate, they produce a toxin called solanine. High-quality potatoes only contain 100 mg of solanine per 100 g, while solanine in green, germinated and rotten potatoes can be increased by 50 times or more. Eating a very small amount of Solanum nigrum is not necessarily harmful to human health, but if you eat 200 mg of Solanum nigrum (about half a dozen potatoes that have turned green and sprouted) at a time, it will take 15 minutes to 3 hours to get sick. The earliest symptoms are itchy mouth and throat, epigastric pain, nausea, vomiting and diarrhea. Those with mild symptoms will heal themselves through their own detoxification function after 1 ~ 2 hours. If you eat 300 ~ 400 mg or more of Solanum nigrum, the symptoms will be very serious, such as dehydration and repeated vomiting caused by rising body temperature, dilated pupils, fear of light and tinnitus. Therefore, patients with severe symptoms should be sent to hospital for treatment as soon as possible. Attention must be paid to prevent potato solanine poisoning. * Don't eat immature green potatoes. * Slight sprouting, blue parts and rotten parts on potatoes should be thoroughly removed. If the potato has a large blue area and many sprouted parts, you should throw it away. * Cut peeled potatoes into small pieces and soak them in cold water for more than half an hour to dissolve the remaining solanine in water. * Using the weak alkalinity of Solanum nigrum, adding proper amount of rice vinegar when cooking potatoes, and decomposing Solanum nigrum with the acidity of vinegar can play a detoxification role. * Cooking potatoes should be crisp and thoroughly burned, and solanine can be partially decomposed by using high temperature for a long time. If you feel a little numb in your mouth when eating potatoes, it means that potatoes still contain more solanine, so you should stop eating them immediately to prevent poisoning. It has been reported that if pregnant women eat too much Solanum nigrum, it may lead to fetal malformation, so pregnant women should be especially careful.