Kombucha is a fermented tea beverage made by combining sweetened tea with a symbiotic culture of bacteria and yeast (SCOBY). During fermentation, the SCOBY consumes the sugar in the tea, producing a slightly effervescent drink with a tangy flavor and low alcohol content. Kombucha is often flavored with fruits, herbs, or spices and is praised for its potential health benefits, including probiotics that may support gut health.