Black tea is a food not a medicine, there is no special effect equivalent to medicine, drinking black tea can replenish water, vitamins and other nutrients. Black tea has certain nutrients, including vitamins, minerals and so on. In addition, black tea also has catechins, tea pigments, and flavonoids. Daily life can be moderate consumption of black tea, to a certain extent, have a refreshing effect, insomniacs should not drink black tea before going to bed, because it has caffeine, so as not to further affect the sleep. In daily life, you should avoid drinking too much strong tea, so as not to cause rapid heartbeat and other discomforts. Black tea is a common food, according to the personal situation of moderate consumption can be, such as discomfort, can promptly consult a doctor, under the guidance of the use of medication.