Kombucha is a fermented, slightly alcoholic, lightly effervescent, sweetened black or green tea drink commonly intended as a functional beverage for its supposed health benefits. Sometimes the beverage is called kombucha tea to distinguish it from the culture of bacteria and yeast. Juice, spices, or other flavorings are often added to enhance the taste of the beverage. The exact origins of kombucha are not known. It is thought to have originated in Northeastern China where the drink is traditionally consumed, or in Russia and Eastern Europe. Kombucha is now homebrewed globally, and also bottled and sold commercially by various companies.