1, onion can reduce fibrinolytic activity and prevent thrombosis. Onion can also improve the tension of gastrointestinal tract, increase the secretion of gastric juice and intestinal juice, and also have the functions of contracting uterus, diuresis, expectoration, sterilization and anti-diabetes.

2. Quercetin in onion is a natural anticancer substance, which has a special effect on treating gastric cancer.