1. Boiled water with scallion is rich in water and scallion, which contains a lot of nutrients such as allicin and thiamine, and has a good sterilization effect. After drinking, it can inhibit the invasion of various germs and bacteria to the human body, especially the cold virus that invades and infects from the upper respiratory tract, so it has the function of preventing colds.

2. Boiled water with scallion contains a lot of carbohydrates, which will stimulate the secretion of gastric juice. At the same time, it also contains volatile components such as diallyl sulfide and diallyl sulfide, which can stimulate the secretion of saliva and digestive juice, and has certain appetizing and digestion promoting effects.

3. The scallion is warm and pungent, which contains a lot of volatile substances. Eating it can promote blood circulation, and it is beneficial to remove the cold gas in the body. It has a good effect of dispersing cold, and it is suitable for drinking when catching a cold.