1, which helps to reduce blood fat and help digestion. Caffeine, vitamin B 1 and vitamin C in tea can increase the secretion of gastric juice, help digestion and enhance the ability to decompose fat. Aromatic compounds contained in tea can also dissolve fat and prevent fat from accumulating in the body. It is helpful to prevent and treat radiation injury. Tea polyphenols and their oxidation products have the ability to absorb radioactive substances. 3 help to refresh yourself. Caffeine in tea can stimulate the central nervous system of human body, enhance the excitement process of cerebral cortex, make people feel refreshed and enhance their thinking and memory ability. 4 is helpful for diuresis and relieving fatigue. Caffeine in tea can stimulate the kidney, promote the rapid excretion of urine, improve the filtration rate of the kidney and reduce the retention time of harmful substances in the kidney.