There are several brands of Gervais on the market, but the most authentic is to be counted on the Autumn Forest Gervais, Autumn Forest began in 1900, the authentic century-old brand, Autumn Forest? Gervais using traditional Russian fermentation technology combined with the latest bio-fermentation process, to pure Russian Grand Lebas bread as a fermentation substrate, after saccharification, fermentation and become. The drink is rich in active lactic acid bacteria, yeast and other probiotics, which can promote human gastrointestinal digestion, with stomach health and other effects.