In life, there are many types of vegetables and fruits. Some vegetable and fruit peels have certain nutritional value and are good for the human body. They can be eaten directly with the skins on. However, some vegetable and fruit peels are not suitable for eating directly because they may contain Some toxic substances can cause food poisoning in humans. So what are the dangers of eating potato peels? Which peels cannot be eaten casually?

1. Vegetable and fruit peels that are not suitable for eating

1. Chronic poisoning of potato peels

Peeling potatoes is quite troublesome! But you must not Take it lightly. Potato skins contain glycoalkaloids, and almost all of this toxic substance is concentrated in potato skins. If eaten by mistake, it will cause poisoning.

2 Sweet potato peels harm the liver

Sweet potatoes (also called sweet potatoes and sweet potatoes) are in direct contact with the soil for a long time, and many harmful substances will be absorbed into the sweet potato peels. Its skin contains a lot of alkali, and eating too much can cause gastrointestinal discomfort. Moreover, sweet potato skins with brown and dark brown spots are infected by "Black Spot Bacteria", which can produce "picone" and "piconol" and enter the human body, which can damage the liver and cause poisoning. There are also some stall owners who sell roasted sweet potatoes and use coke as fuel to save costs. The harmful substances such as sulfur dioxide produced are also easily deposited in the sweet potato skins.

3 Persimmon skin hurts the intestines and stomach

Studies have proven that tannic acid can cause damage to the intestines and stomach. When persimmons are not mature, tannic acid mainly exists in the persimmon flesh. When persimmons mature, tannic acid will be concentrated in the persimmon skin, so the ripe persimmon skin will feel astringent when eaten. The tannic acid contained in persimmons will combine with the protein in the food to form a precipitate under the action of gastric acid. That is, persimmon stone can easily cause upper abdominal discomfort, fullness, and loss of appetite. Therefore, do not eat unpeeled persimmons, and do not eat persimmons on an empty stomach.

4 Ginkgo skin can damage nerves

Ginkgo peel contains toxic substances such as “gingkolic acid”, “hydrogenated ginkgo acid”, “hydrogenated ginkgo acid” and “gingkool”, etc. It will damage the central nervous system of the human body and cause poisoning.

5 Water chestnut skins contain parasites

Water chestnuts often grow in paddy fields. Water chestnut skins also contain parasites or eggs. If you eat unwashed water chestnut skins when they are raw, , can cause disease.

2. What foods are beneficial to eat?

1. Winter melon peel

It has the effects of relieving heat, strengthening the spleen, and diuresis, and can be used to treat kidney disease and lung disease. , edema, abdominal distension, difficulty urinating, etc. caused by heart disease. Washing your feet with decoction of winter melon peel can cure athlete's foot and foot odor, killing two birds with one stone.

2 Watermelon rind

If we talk about relieving summer heat and quenching thirst, watermelon rind is better than watermelon pulp. In traditional Chinese medicine, watermelon rind and juice are used as medicine to form "Watermelon Green Clothes". It has the effects of clearing away heat, relieving heat, purging fire and removing troubles, and lowering blood pressure. It has certain curative effects on anemia, dry throat, cleft lip, cystitis, liver ascites, and nephritis.

3 Cucumber peel

Some people peel cucumbers when eating them. It is a pity. The green color of cucumbers contains chlorogenic acid and caffeic acid, which can act as antibacterial, anti-inflammatory and stimulate leukocyte phagocytosis. role. Eating cucumber with its skin is a good medicine for those who often have sore throats.

4 Banana peel

Banana peel contains an active ingredient that inhibits fungi and bacteria-abanopetin. It can treat skin itching caused by fungal infections. Banana peel has the effect of moistening the lungs and intestines, dredging the blood vessels, and increasing the essence. Mash banana peels and add ginger juice to reduce inflammation and relieve pain. Rubbing hands and feet with banana peels can prevent and treat chilblains. In addition, banana peels are dried and ground into powder, which is also a good beauty product.

3. Benefits of eating apples with their skins

1. Apple skins contain the most dietary fiber. The skin of a medium-sized apple contains 4.4 grams of dietary fiber. After peeling, the dietary fiber in the apple meat is only 2.1 grams.

2. Apple skin contains the most vitamins. The skin of a medium apple contains 8.4 mg of vitamin C and 98 international units (IU) of vitamin A. After peeling, the apple pulp contains only 6.4 mg and 61 international units of these two vitamins.

3. Eating apples with their skins on protects the lungs.

A study published in the American "Health" magazine found that apple peels are rich in the natural antioxidant quercetin, which can protect the lungs from pollutants. Eating at least 5 apples with the skin a week can improve lung function.

4. Eating apples with their skins on protects memory. An early study also found that the antioxidant quercetin, which is rich in apple peels, may help protect memory by preventing brain tissue damage associated with degenerative diseases such as Alzheimer's disease.

5. Apple peel has anti-cancer effect. The American Journal of Agricultural and Food Chemistry published a study conducted by Cornell University food science expert Professor Liu Ruihai and his colleagues and found that apple peel has good anti-cancer and anti-cancer effects. Researchers have identified more than a dozen triterpenoid compounds from apple peels. These substances can inhibit the growth of cancer cells such as liver, colon or breast cancer, and can also kill cancer cells.

6. Eating an apple with skin every day can help lose weight. Apples are high-fiber, low-calorie foods. If you eat them regularly, you won’t feel hungry and your calorie intake will be low, which can help you lose weight.

Many people are worried that there will be pesticide residues on the surface of apple peels. In fact, if they are properly cleaned, they can be eaten with confidence. Soak the apples in warm water, gently brush them back and forth with a small brush, and finally rinse them with water, and you can eat them with confidence. You can also put a little salt on the skin of the apple after soaking it in water, then hold the apple with both hands and rub it gently back and forth. The dirt on the surface will be wiped clean quickly, and then rinse with water, and you can eat it with confidence. The principle of such cleaning is to take advantage of the small particle state of salt to enhance friction. Moreover, the salt itself also has a disinfecting effect. In addition, you can also use toothpaste to clean. Don't feel disgusted by applying toothpaste to apples. You brush your teeth every day and you don't know how much toothpaste you consume. Applying toothpaste to the surface of the apple as a cleaner is also very useful, because the active agent in the toothpaste can easily pick up the dirt on the surface of the apple.