Onions contain" sulfur-containing organic compounds" and HOH peel flavonoids ( also called quercetin ketone )", by confirmed, mostly on human performance of these 2 components contributed to.
In addition to the 3 major nutrients in carbohydrate and protein content of more, in which protein of sulfur amino acid and arginine may prevent hardening of the arteries. And minerals in addition to sulfur, there are a lot of vanadium, prevents cholesterol attached to the vessel, the prevention of heart disease; the most abundant in vitamin C vitamin.
Cancer prevention
Gastric cancer, esophageal cancer, colorectal cancer is mainly due to excessive intake of animal fat, salt, smoked products ... Onion, and organic sulfur compounds, capable of inducing carcinogenic substances ( such as: nitrite ) detoxification ferment.
Prevent aging
Glycated protein can cause hypothyroidism, produce and aging related substance AGE, onion can control blood sugar, indirect prevention of AGE generation, prevent aging. While the Hoh peel flavonoids, is a powerful antioxidant, can inhibit free radical caused by aging.
Reduce blood sugar
Onions can be as antidiabetic agents! Because according to lower blood glucose in clinical trials, it has the effect of 80%, at the same time will not cause hypoglycemia, is safe and effective anti diabetic food.
Blood cleaning function
Fibrinolysis ( dissolved fiber so that the blood circulation and smooth) level and hypertension, hyperlipidemia, arteriosclerosis ... All about. According to the experiment, weekly intake enough onion man fibrinolytic activity is highest, and do not eat or eat on the fibrinolytic activity of low, showing the onion can enhance the fibrinolytic activity, reach the blood cleaning effect.
The improvement of constipation
Onion sulfur in colorectal and protein, or intestinal bacteria in combination, the formation of hydrogen sulfide, can promote intestinal peristalsis. Food rich in soluble fiber, can stimulate the intestines, so that movement is more exuberant, and oligosaccharides can also inhibit intestinal bad bacteria proliferation, effectively improve the common symptoms of constipation.
Prevention of osteoporosis
Onions contain HOH peel flavonoids estrogen-like effect, and the female hormone or osteoporosis drug match, research reports, eat 200-300g onions, may be effective in the prevention of osteoporosis.
Skin problems
Valley glutathione too, can inhibit the production of melanin, the skin inflammation, eczema, urticaria or liver spots have improved. While the Hoh peel flavonoids against UV, has a whitening effect.
Improvement of eye fatigue
Glutathione is the promotion of corneal collagen synthesis, maintaining lens transparency. The onion is rich in glutathione, experiments prove that the improved eye fatigue, eye blur effect.