But you need to know the specific drinking time of the two kinds of water. If you don't master it well, it is harmful to your health. For example, it is recommended to drink boiled water on an empty stomach in the morning, because drinking boiled water on an empty stomach can excrete some residual substances in the body and dilute the sodium content in the blood, thus reducing blood lipid and blood pressure. Drinking boiled water on an empty stomach in the morning can also promote defecation and prevent constipation. It is recommended to drink tea for one to two hours after meals, but it is recommended to drink light tea instead of strong tea, because drinking strong tea is harmful to your health.