Because onions have a spicy taste, many people are reluctant to eat them, especially when it comes to chopping onions. But eating onions has a great effect. In the European and American markets, the onion is known as the “vegetable queen†of vegetables. Besides the taste, the special nutrients contained in the bulbs and leaves of the onions can also help the physical weakness. constitution.
effect
Onion is rich in nutrients, not only rich in potassium, vitamin C, folic acid, zinc, selenium, and fiber and other nutrients, there are two special nutrients - quercetin and prostaglandin A. These two kinds of special nutrients make onion have many irreplaceable health effects of other foods:
1, prevent cancer
In this cancer-stricken society, there is a kind of food that can prevent cancer. This is really a great news! What's more, researchers have also found that onions and their family members can help prevent and control various cancers. Is "various" Oh! In France, a study conducted on women found that women who consumed more onions and garlic had a lower chance of developing breast cancer.
The anti-cancer efficacy of onions comes from its rich selenium and quercetin. Selenium is an antioxidant that stimulates the body's immune response, thereby inhibiting the division and growth of cancer cells, while also reducing the toxicity of carcinogens. Quercetin can inhibit the activity of cancer cells and prevent the growth of cancer cells. A survey showed that people who eat onions are 25% less likely to suffer from stomach cancer than those who do not eat, and 30% less on stomach cancer.
2. Maintain cardiovascular health
Onion is the only vegetable known to contain prostaglandin A. Prostaglandin A can dilate blood vessels and reduce blood viscosity, and therefore it can produce blood pressure, increase coronary blood flow, and prevent thrombosis. Quercetin, which is abundant in onion, has high bioavailability. Scientists report that quercetin may help prevent the oxidation of low-density lipoprotein (LDL), which can provide important atherosclerosis. Protection.
3, stimulate appetite and help digestion
The onion contains onion and garlic, with a strong aroma. It often makes people cry because of the pungent smell. It is this special smell that stimulates the secretion of gastric acid and increases appetite. Animal experiments have also proved that onion can increase the gastrointestinal tract tension, promote gastrointestinal motility, and thus play an appetizing role, has a significant effect on the loss of appetite caused by atrophic gastritis, gastric insufficiency, indigestion and so on. Of course, if you are on a diet to lose weight, then this effect of onion is obviously not suitable for you!
4, sterilization, anti-cold
Onion contains phytoncide such as allicin, has a strong bactericidal ability, can effectively resist influenza virus, prevent colds. When this phytoncide is excreted through the respiratory tract, urinary tract, and sweat glands, it can stimulate the secretion of cell walls at these locations, so it has the effects of phlegm, diuresis, sweating, and antibacterial and antiseptic.
Tips: purple skin onion nutrients higher
According to skin color, onions can be divided into white, yellow and purple skin three. From the perspective of nutritional value, purple skin onions have better nutrition. This is because purple onions taste more spicy than onions of the other two varieties, which means that they contain more allicin. In addition, purple skin onion contains more quercetin.
5, onions have a good prevention of "rich disease"
Used for headaches, stuffy nose, body weight, chills, fever, and no sweat caused by exogenous cold. Coca-Cola 500ml, add onion 100g shred, ginger 50g shred, a small amount of brown sugar, boil for about 5min, hot drinks.
In recent years, it has been discovered that, on the other hand, onions can effectively prevent "rich ailments", and onion contains yellow urethane, which allows cells to make better use of sugars and lower blood sugar. Onions also contain prostaglandins, which can dilate blood vessels, reduce peripheral vascular resistance, promote sodium excretion, and reduce elevated blood pressure.
Onion contains a small amount of raffinose is a functional oligosaccharide, is an important sugar onion resistant to harsh environments (cold, drought tolerance). Raffinose can proliferate Bifidobacterium in human body and play a role in laxative, lipid-lowering and blood pressure lowering.
Onion also contains diallyl sulfide, which has the function of preventing arteriosclerosis and reducing blood fat. Can also be detected in the onion cortex containing corticosteroids, flavonoids formed in the induction of flavonoids beneficial urine swelling effect, these are beneficial for the prevention of obesity, high cholesterol, arteriosclerosis, and onion dry Wet detoxification function is consistent.
6, other effects
The prostaglandin A is a kind of strong vasodilator, which can resist vasopressor substances such as catecholamine, promote sodium excretion, and lower blood pressure.
The sulphides contained can promote fat metabolism, have hypolipidemic, anti-atherosclerotic effects, if the daily consumption of 50 ~ 70g onions, its lipid-lowering effect than taking the lipid-lowering drug Clofibrate;
Onion contains flavonoids can reduce the viscosity of platelets, eat onion can prevent thrombosis, reduce the probability of myocardial infarction and cerebral thrombosis;
Onions contain similar organic substances as the hypoglycemic agent sulfasamide, which can significantly reduce blood glucose levels;
Sulfides and trace elements such as selenium can inhibit gastric cancer, esophageal cancer, colon cancer, and breast cancer;
Onion contains volatile oil can help sex, the elderly often eat onions can improve the quality of sexual life;
Onion can increase the bone density of experimental mice, and eating onions can prevent osteoporosis.
Onion is rich in vitamin C, niacin, they can promote the formation of interstitial cells and damage the repair of cells, make the skin smooth, ruddy and elastic, with a cosmetic effect. Containing sulfur, vitamin E, etc., can prevent the formation of lipofuscin pigments from unsaturated fatty acids and prevent age spots.
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