And what is a "kombucha"?

Kombucha is a fermented tea that is often drunk for medicinal purposes. The health benefits of Kombucha are antimicrobial, anticancer, to have hepatoprotective qualities, and to be antioxidative among other benefits.

Kombucha is available commercially and can be made at home by fermenting tea using a visible, solid mass of good bacteria and yeast, which forms the kombucha culture which is often referred to as the "mushroom" or the "mother".

Famous brand can be found in supermarket like WholeFoods. An example of a brand name is "GT".