Eating too many onions, what are the advantages or disadvantages?

Onion, also known as onion, is closely related to garlic and has similar spicy taste and chemical structure. Onion contains almost no fat, but its essential oil contains a mixture, which contains sulfide, which can lower cholesterol. It is reported that onion is the only known plant containing prostaglandin, and it also contains components that can activate fibrinolytic protein activity. These substances are strong vasodilators, which can reduce the resistance of peripheral blood vessels and coronary arteries, resist the effect of pressor substances such as catecholamine in human body, promote the excretion of sodium salts, and thus lower blood pressure. It can be said that onion is a good plant medicine for patients with cardiovascular diseases such as hyperlipidemia and hypertension. So onions have been valued since ancient times.

Every 100g of fresh onion contains about C8mg of water, 1. 1g of protein, 8. 1g of carbohydrate, 0.9g of crude fiber, 0.2g of fat, 0.5g of ash, 0.02mg of carotene and b/kloc-0. In addition to general nutrients, onions also contain biological active substances such as sterilization and sterilization. Allicin and various sulfur-containing compounds in onions can kill a variety of bacteria and fungi in a short time. Some bioactive components in onion can promote the excretion of sodium water in kidney and have diuretic effect; Onion oil can lower blood fat; Onion has a high K factor (K-Na ratio) (33.42) and contains prostaglandin A 1, which can relax blood vessels, reduce the resistance of peripheral and coronary vessels and resist catecholamine substances, thus showing the effect of lowering blood pressure. Methylsulfonylurea contained in onion has the function of lowering blood sugar; Onions contain high selenium content and have anti-cancer effect. In recent years, medical clinic and research have proved that onion has a variety of high physiological and medicinal values. It is regarded as a multifunctional nutritional health food with blood lipid lowering, blood pressure lowering and anti-cancer in nutritious diet, and enjoys the reputation of "the queen of vegetables".

Onion is a special vegetable with nutrition, medical care and health care functions.

Onions are very nutritious,

Its hypertrophy bulb contains 8.5% sugar and 9.2% dry matter. Every 100g contains vitamin A5 mg, vitamin C9.3mg, calcium 40mg, phosphorus 50mg, iron 8mg and 18 amino acids, which is a rare health food.

Chinese and western medicine have proved that onion has the function of calming the liver and moistening the intestines, and its volatile oil contains diallyl disulfide, which is the only prostaglandin-like substance and active ingredient that can activate fibrinolysis. These substances have a strong ability to relax blood vessels and coronary arteries, and can also promote the excretion of sodium salts, thereby lowering blood pressure and preventing thrombosis.

Modern medical research also shows that onion contains trace element selenium. Selenium is an antioxidant. Its special function is to produce a large amount of glutathione. The physiological function of glutathione is to transport oxygen for cell respiration. With the increase of human selenium content, the incidence of cancer will be greatly reduced. Therefore, onion is a healthy food.

The function of onion

Onions are more effective than drugs for osteoporosis. Housewives don't like to cook with onions, which will make people cry. Many people are also afraid of the smell of onions. Unless it's an excellent onion dish, it's really hard to find onion lovers. But people who want to make their bones strong, grow tall and prevent osteoporosis, it is better to hold their noses and eat onions. Because the latest research report of the authoritative magazine Nature points out that onion is the most effective vegetable to prevent bone loss. The effect of onion on preventing bone loss is even better than calcitonin, a drug for treating osteoporosis. The researchers asked male mice to eat one gram of dried onions every day. After four weeks, the average bone mass of male rats increased by 13.5- 18%. Another group of experiments found that letting mice eat mixed vegetables containing onions can also reduce the problem of bone loss. In experiment 3, the ovariectomized female rats ate1.5g onion every day, and the bone loss rate decreased by 25%. What's more noteworthy is that the health care function of onion can be seen in just 12 hours.

Researchers believe that the function of onion may come from "preventing bone loss", so people who want to use onion for health care may eat 200-300 grams (10 ounce) of onion every day to prevent osteoporosis. Medicine and food are homologous. In our daily food, there are many fruits and vegetables with similar drug effects. Onion, an indispensable side dish in western food, has more health benefits than expected. Scrambled eggs with onion, or beef with onion, are delicious and healthy dishes; Onions can also be eaten raw or juiced. According to medical experiments, it can play a variety of magical effects.

Onions can prevent high cholesterol.

According to the research of Dr. Dick Dogel Wei Zhi, a professor of cardiology at Harvard Medical School, eating half an onion raw or drinking the same amount of onion juice every day can increase the high-density lipoprotein content of patients with heart disease by about 30% on average (high-density lipoprotein is high-density lipoprotein cholesterol, which is considered to help prevent atherosclerosis and is also a kind of beneficial cholesterol. Eating half an onion raw every day, or drinking the same amount of onion juice to protect the heart, was originally a folk prescription. Dr. Kedo conducted experiments on patients in his own clinic, which proved that onions do have the effect of raising cholesterol, but the more onions are cooked, the less effective they are.

Onions can break down fat.

Dr. Kedo asked heart patients in the clinic to eat onions every day, and found that the compounds contained in onions can also prevent platelet coagulation and accelerate thrombolysis. Therefore, when you enjoy high-fat food, it is best to match some onions, which will help offset the thrombosis caused by high-fat food; So it makes sense that steak is usually eaten with onions.

Onions can prevent stomach cancer.

Onions, garlic, scallions and leeks are Allium vegetables because they contain anticancer chemicals. A survey conducted by researchers in a high incidence area of gastric cancer in Shandong Province, China, found that the more onions you eat, the lower the risk of gastric cancer.

Onions can fight asthma.

Onion contains at least three natural anti-inflammatory chemicals, which can treat asthma. Because onion can inhibit the activity of histamine, which is a chemical substance that can cause allergic symptoms of asthma; According to German research, onions can reduce the incidence of asthma by about half.

Onions can cure diabetes.

Onions have been used to treat diabetes for a long time. In modern times, medicine has also proved that onions can really lower blood sugar, and they have the same effect whether eaten raw or cooked. It turns out that there is an antidiabetic compound in onion, which is similar to methanesulfonic acid, a commonly used oral hypoglycemic drug, and has the effect of stimulating insulin synthesis and release.

Onions have many other functions.

The wonderful use of onions is not limited to the above. In daily life, onions can also be used to prevent insomnia: put chopped onions on pillows, and the unique stimulating ingredients of onions will play a magical role in calming the nerves and inducing people to sleep. Drink some hot miso soup with onions when you have a cold, and you will soon sweat and reduce your fever. If the nose is blocked, stick a small piece of onion on the nostril, and the pungent smell of onion will make the nose unblocked instantly. If you cough, wrap the chopped green onion with gauze and cover it from the throat to the chest, which can also quickly suppress the cough.