1. Alive green onions, like onions, contain diallyl sulfide, which stimulates the secretion of gastric juice and helps to increase appetite. When ingested together with foods with high vitamin B 1 content, it will promote the transformation of starch and sugar in food into calories and relieve fatigue.

2. Sweating and bacteriostasis Welsh onion can stimulate the sweat glands of the body and achieve the function of sweating and heat dissipation; Onion oil can stimulate the upper respiratory tract and make sticky phlegm easy to cough up. Allicin contained in onion has obvious function of resisting bacteria and viruses, especially for dysentery bacilli and skin fungi.

3. Promoting blood circulation Welsh onion is rich in vitamin C, which can relax small blood vessels and promote blood circulation, prevent dizziness caused by high blood pressure, keep the brain flexible and prevent Alzheimer's disease. The volatile oil and capsaicin of scallion can get rid of the peculiar smell in greasy and thick dishes such as fishy smell and produce special aroma. If it is eaten with mushrooms, it can also promote blood circulation.

4. All kinds of vitamins in the onion can ensure the normal secretion of human hormones, and can also effectively stimulate sexual desire, thus "strengthening yang and nourishing yin".