2. It can supplement nutrition and qi and blood for human body, protect cardiovascular system and prevent hypertension, and the anthocyanin contained in it is beneficial to human liver. In addition, it is rich in cellulose, which can enhance gastrointestinal peristalsis and promote digestion. After drinking in tea, it also has the functions of promoting blood circulation, enriching blood, relieving summer heat and clearing fire, and resisting oxidation.