1. Relieve oral odor: Pu 'er tea contains a variety of physiologically active components, which has the function of sterilization and disinfection. Drinking green tangerine tea can get rid of bad breath, protect teeth and keep your mouth clean.

2. Antibacterial effect: Xiaoqing orange contains hesperidin, which has antifungal effect. In vitro, it can inhibit the proliferation of sub-tumor cells and release histamine from basophils.

3. Promoting metabolism: nobiletin has the functions of anti-hemagglutination, anti-thrombosis, anti-cancer, anti-fungus, anti-inflammation, anti-allergy, anticholinesterase and anti-epilepsy, and it is a carbohydrate metabolism promoter, while tangerine peel contains nobiletin.