1 Maintain cardiovascular health
Onion is the only known vegetable containing 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. Onion is rich in quercetin and has high bioavailability. Quercetin may help prevent the oxidation of low density lipoprotein (LDL) and provide important protection for atherosclerosis.
2 Prevention of cancer
In this society where cancer turns pale, there is a kind of food that can prevent cancer, which is really great news! More importantly, the researchers also found that onions and their family members can help prevent and control various cancers. It's "various"! In France, a study on women shows that women who eat more onions and garlic have a lower risk of breast cancer.
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 obviously improving anorexia caused by atrophic gastritis, insufficient gastric motility and dyspepsia. Of course, if you are on a diet to lose weight, then this effect of onions is obviously not suitable for you!
4 sterilization, cold protection
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.