Black tea fungus, also known as "Haibao" and "Weibao", is a substance that is beneficial to human body after being fermented with sugar, tea and water. Its acidity inhibits the growth of harmful bacteria, which is very beneficial to human health, especially for atrophic gastritis and gastric ulcer, and also has the functions of regulating blood pressure, improving sleep and preventing and treating various diseases.

The membrane of black tea fungus resembles the skin of jellyfish, so it is called "Haibao"; Kombucha is a biofilm. According to analysis, its thallus is an organism of yeast, lactic acid bacteria and acetic acid bacteria.

Because black tea fungus can help digestion and treat a variety of stomach diseases, it is called "Wei Bao" in some places; Also known as "black tea fungus", because it is made of black tea water and white sugar and contains yeast, acetic acid bacteria and lactic acid bacteria. Black tea fungus is rich in vitamin C, vitamin B and other nutrients, and contains three kinds of microorganisms (such as yeast) that are beneficial to human body. Therefore, it can regulate the physiological function of human body, promote metabolism, help digestion, prevent arteriosclerosis, resist cancer, preserve health and strengthen the body, and become a health drink popular all over the world.

Kombucha has been widely used in China 150 years. In recent years, the practice of applying black tea fungus in medical circles at home and abroad shows that black tea fungus can treat many chronic diseases, such as hypertension, arteriosclerosis, coronary heart disease, diabetes, constipation, hemorrhoids, obesity, alopecia areata, white hair, cataract, rheumatoid arthritis, gastritis, dysentery, anemia, riboflavin deficiency and so on.