(1) Polysaccharides, tea polyphenols, isomaltooligosaccharides and theophylline in black tea fungus: improve human immunity and enhance self-resistance; Regulating blood lipid and blood sugar; Promote the growth of bifidobacteria and reduce intestinal corruption and carcinogens; Increase the number of T lymphocytes and B lymphocytes, and improve the body's defense ability. (2) Acetic acid, lactic acid and citric acid in black tea fungus: clean the stomach, help digestion, prevent constipation, improve the stability of vitamins, prevent harmful bacteria and viruses from invading, and prevent colds. (3) Caffeine in black tea fungus: improve brain vitality, eliminate fatigue and cheer up. (4) Probiotics in black tea fungus: yeast, acetic acid bacteria and lactic acid bacteria, which can play a special health care role for human body. (5) The beneficial bacteria in black tea fungus have the function of clearing stomach and intestines, can disinfect and detoxify, and are suitable for curing acute and chronic gastritis, enteritis, constipation, intractable constipation, intractable diarrhea and dysentery.