Fruits and vegetables are rich in vitamins and minerals, and are indispensable foods in life. Usually, people are very particular about eating. When buying fruits and vegetables, they will worry about whether there are pesticide residues in them. In fact, some parts of common fruits and vegetables are inedible, so which parts of common vegetables are inedible? Where are the inedible parts of common fruits and vegetables?

1, common parts of fruits and vegetables cannot be eaten.

Potato-skin, stem and bud

Potatoes contain a toxic compound solanine, also called solanine. After ingesting solanine, it will stimulate the gastrointestinal mucosa, paralyze the nervous system, hemolyze red blood cells, and cause acute brain edema and gastroenteritis. When it accumulates to a certain amount in the body, it may cause chronic poisoning. The main symptoms are aggravated stomach pain, nausea, vomiting, dyspnea, shortness of breath, accompanied by general weakness and organ failure, and even death in severe cases!

The content of this substance in potato is generally 0.005% ~ 0.0 1%, and it will increase with the storage time, especially after germination, the solanine content in potato buds and eyes is as high as 0.3% ~ 0.5%! However, solanine in ungerminated potato mainly exists in potato skin, especially in green potato skin, with high content. Therefore, if you find that the potatoes you bought have sprouted or turned green, don't eat them. Peel them.

Beans-silk at both ends and sides

The silk at both ends and sides of beans contains a large number of toxic factors such as phytohemagglutinin and saponin, which has a stimulating effect on human stomach. After entering the blood circulation, it can also destroy human red blood cells and coagulation function. So when eating beans, it is best to pinch the head and tail and tear off the silk on both sides.

In addition, beans themselves also contain a lot of saponin, which needs high temperature cooking to eliminate its toxicity. So in the process of cooking beans, be sure to cook them thoroughly. In addition, the half-cooked (under-cooked at 80℃) soybean milk will have a higher toxin content, which must be avoided.

Tomato leaf

Mature tomatoes are nontoxic, but their leaves contain a chemical called glycoside alkaloid, especially in wild tomatoes. Eating too much of this substance will lead to gastric dysfunction, anxiety and tension, and poisoning. In addition, immature tomatoes, which are blue tomatoes, contain a lot of lycopene. If people consume a large amount of lycopene in a short time, they may have symptoms of poisoning.

Sweet potato skin

In the process of land growth, sweet potato mainly absorbs nutrients by skin, which will lead to many harmful substances being inhaled into sweet potato slices, and the sweet potato skin contains too much alkali, which is not a good thing. Eating too much can easily cause gastrointestinal discomfort.

In addition, when selecting sweet potatoes, we should pay more attention to whether there are brown and dark brown spots on the epidermis, because this is a disease infected by "black spot bacteria", which will produce toxic substances "sweet potato ketone" and "sweet potato ketone alcohol", which is harmful to human liver.

Eggplant-leaves and flowers

Like potatoes and tomatoes, eggplant leaves and flowers also contain solanine. Don't eat it. Some people say that eating eggplant raw will cause poisoning, but it is not. Leaves and flowers should be the most alert to eggplant, so be careful not to eat them by mistake.

apple core

Apple kernel contains amygdalin, which releases toxic cyanide when it comes into contact with intestinal digestive enzymes. Symptoms of mild poisoning include headache, dizziness, confusion, anxiety, palpitation and vomiting. A large amount of hydrocyanic acid can cause dyspnea, hypertension, rapid heartbeat and renal failure.

Although eating an apple or two won't do much harm to your health, it will affect your taste, so don't eat it. Besides, cherry stones are not edible. Once the cherry pit is chewed or chewed, it will automatically produce hydrocyanic acid, so be careful not to eat it by mistake. There are raw almonds, which also contain toxic substances, especially bitter raw almonds, which are rich in cyanide. You must avoid eating them raw.

Fresh day lily root

The root of day lily contains colchicine, which is harmful to human body. Colchicine is easy to be produced by human body after eating, which destroys cell division ability and causes cell death. At the same time, it can also cause gastrointestinal discomfort, abdominal pain, vomiting, diarrhea and other symptoms similar to acute gastroenteritis. When eating fresh day lily, it is best to boil it in boiling water for a while, and then soak it in clear water to remove most of the water-soluble colchicine. Dried day lilies sold in the market are generally non-toxic and can be safely eaten.