Ombucha powder is a fermented beverage consisting of black tea and sugar (various fruit or honey, which is used as a functional, probiotic food. It contains a colony of bacteria and yeast that are responsible for initiating the fermentation process once combined with sugar.After fermentation, kombucha becomes carbonated and contains vinegar, B vitamins, enzymes, probiotics and a high concentration of acid (acetic, gluconic and lactic). These bacteria are known as "cellulose-producing bacteria," meaning they produce cellulose, which acts as a shield to cells.