The efficacy and function of onion
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Onions have long been on the tables of tens of millions of families and are very nutritious. Let’s learn more about them. Onion EffectModern medical research also shows that onions contain trace elements such as selenium. Selenium is an antioxidant, and its special function is to enable the human body to produce a large amount of glutathione. The physiological function of glutathione is to transport oxygen for cell respiration. When the selenium content in the human body increases, the incidence of cancer will be greatly reduced. Therefore, onions are also a health food. Onions also have the effect of lowering blood sugar, because onions contain organic substances similar to the hypoglycemic drug mesitylene, and can produce picrotoxin, which has a strong diuretic effect, in the human body. Eating 25 to 50 grams of onions per meal can play a good role in lowering blood sugar and promoting diuresis in diabetic patients. In addition to stimulating appetite and aiding digestion, the phytoncide in onions can also stimulate the secretion of the duct walls when it is excreted through the respiratory tract, urinary tract, and sweat glands. Therefore, it has the effects of expectoration, diuresis, sweating, prevention of colds, and antibacterial and antiseptic.Onion BenefitsOnion is not only the most common vegetable, but also has many health benefits. Recent medical research shows that the benefits of onion are mainly manifested in the following eight aspects: 1. Onions have the effect of dispelling wind and cold because onion bulbs and leaves contain a kind of oily volatile substance called propylene sulfide, which has a spicy taste. This substance can resist cold, resist influenza virus, and has a strong bactericidal effect; 2. Onions are rich in nutrients and have a pungent smell. They can stimulate the secretion of the stomach, intestines and digestive glands, increase appetite and promote digestion. Onions do not contain fat, and their essential oils contain a mixture of sulfur compounds that can lower cholesterol. They can be used to treat indigestion, loss of appetite, food stagnation and other symptoms. 3. Onions are the only food known to contain prostaglandin A. Prostaglandin A can dilate blood vessels and reduce blood viscosity, thus lowering blood pressure, reducing peripheral blood vessels and increasing blood flow in coronary arteries, and preventing thrombosis. It can counteract the effects of pressor substances such as catecholamines in the human body, and promote the excretion of sodium salt, thereby lowering blood pressure. Regular consumption has a health-care effect on patients with hypertension, hyperlipidemia, and cardiovascular and cerebrovascular diseases. 4. Onions have a certain refreshing effect. They can help cells better utilize glucose, lower blood sugar, and provide heat energy to brain cells. They are a good vegetable for the treatment of diabetes and mental depression. 5. Onions contain a substance called "quercetin"9, which is one of the most effective natural anti-cancer substances known so far. It can prevent the biochemical mechanism in the body from mutating and control the growth of cancer cells, thus having an anti-cancer effect; 6. The trace element selenium contained in onions is a strong antioxidant that can eliminate free radicals in the body, enhance cell vitality and metabolic capacity, and has the effect of preventing cancer and anti-aging; 7. Onions also contain a certain amount of calcium. In recent years, Swiss scientists have found that eating onions regularly can increase bone density and help prevent and treat osteoporosis. 8. Onions contain phytoncide such as allicin, which has strong bactericidal ability. Chewing raw onions can prevent colds. |
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