Refreshing and relieving fatigue: caffeine in black tea can stimulate the nerve center of cerebral cortex, thus refreshing the brain, making the thinking reaction more acute and enhancing memory; Black tea also has an exciting effect on the vascular system and the heart, accelerating blood circulation to promote metabolism. At the same time, black tea can promote sweating and diuresis, and achieve the effect of eliminating fatigue. Therefore, in college life, college students may experience hard work in high school and lack of sleep. The efficacy of black tea can effectively help them relieve stress and play an important role in their own health. In this era of rapid development, enjoying comfortable time has become the choice of most people. So this may be why college students like to drink black tea.