Function:
Onion contains prostaglandin A and quercetin, which can dilate blood vessels, reduce blood viscosity, lower blood pressure, increase coronary blood flow and prevent thrombosis.
2. Onion can enhance fibrinolytic activity, help cells make better use of glucose, and has the functions of reducing blood fat, resisting arteriosclerosis and lowering blood sugar.
3. People with spleen deficiency and food stagnation can choose to eat onions, which have the function of strengthening the spleen and promoting digestion.
Expert tip:
Onion has the effects of regulating qi and stomach, strengthening spleen and promoting digestion, and dispelling cold. Can lower blood pressure, prevent thrombosis, reduce blood lipid, prevent arteriosclerosis, and lower blood sugar.
Onion is rich in nutrition, which contains not only potassium, vitamin C, folic acid, zinc, selenium, fiber and other nutrients, but also two special nutrients-quercetin and prostaglandin A. These two special nutrients make onion have many irreplaceable health care effects.
1, cancer prevention
The anticancer effect of onion comes from its rich selenium and quercetin. Selenium is an antioxidant, which can stimulate human immune response, thus inhibiting the division and growth of cancer cells and reducing the toxicity of carcinogens. Quercetin can inhibit the activity of carcinogenic cells and prevent the growth of cancer cells. According to a survey, people who often eat onions are 25% less likely to develop gastric cancer than those who don't, and 30% fewer people die of gastric 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, so it can lower blood pressure, increase coronary blood flow and prevent thrombosis. Quercetin, which is rich in onion, has high bioavailability. Scientists report that quercetin may help prevent the oxidation of low density lipoprotein (LDL) and provide important protection for atherosclerosis.
3. Stimulate appetite and help digestion
Onions contain allicin, which has a strong aroma. When processing, it often makes people cry because of its pungent smell. It is this special smell that can stimulate gastric acid secretion and increase appetite. Animal experiments have also proved that onion can improve gastrointestinal tension and promote gastrointestinal peristalsis, thus playing an appetizing role, and has obvious curative effect on anorexia caused by atrophic gastritis, insufficient gastric motility and dyspepsia.
4, sterilization, cold
Onion contains phytoncide, such as allicin, which has strong bactericidal ability and can effectively resist influenza virus and prevent colds. When this phytoncide is excreted from the body through respiratory tract, urinary tract and sweat gland, it can stimulate the secretion of cell wall in these parts, so it has expectorant, diuretic, sweating, bacteriostatic and antibacterial effects.