This is because onion is rich in vitamins and volatile oil, which has a strong stimulating effect on the secretion of digestive glands, thus playing a good role in strengthening the stomach and promoting digestion.

2, onions have a very good bactericidal and anti-inflammatory effect.

Onion can effectively kill some staphylococci, streptococci, dysentery bacilli and diphtheria bacilli in the body, which can keep people in a very good health state.

3. Onions also have very good expectorant and diuretic functions.

This is because phytoncide contained in onion has very good effects of sweating, preventing colds, inhibiting bacterial growth and preventing corrosion. Quercus substances contained in onion are induced by flavonol in human body and undergo a series of reactions to form a medicinal glycoside. This medicinal glycoside has a very good diuretic effect, and onion is often used to treat edema caused by nephritis and other diseases in clinic.

4. Onions have a very good refreshing effect.

This is because allicin contained in onion can stimulate human lacrimal gland to secrete tears, and it also has a very good refreshing effect, so it can promote human metabolism, enhance human physical strength, eliminate fatigue and improve attention. In addition to these, onions also have a very good effect on promoting brain activation.

Onions can also prevent cerebral thrombosis.

This is because there are some active ingredients in onion that can activate plasminogen, which can play a good role in preventing platelet aggregation. Some patients with cerebral thrombosis can eat more onions in their daily lives.

6. Onions are good for human cardiovascular health.

The cyclic alliin contained in onion is a particularly effective component, which can reduce human blood lipid, so onion is often used to fight atherosclerosis. Onions also contain prostaglandin, which is a good vasodilator and softener, which can reduce the resistance of blood vessels and coronary arteries.