Kombucha consists of tea, sugar, clean water and a SCOBY. “SCOBY” stands for symbiotic culture of bacteria and yeasts. The sugar feeds the yeast and bacteria which form the SCOBY layer — the very identifiable, thick, mushroomy layer that rests on the top of the kombucha. This SCOBY adds the flavor, acidity and promotes the fermentation which creates the health benefits. It also contains a small amount of alcohol (only .5%-3% depending on fermentation), gluconic, acetic, lactic acids and some substances that discourage bacteria. Many people describe the taste of kombucha as sweet and acidic, almost like soda with a slight vinegar taste.