Scientific research has shown that the vitamins Bl, B2, C and D contained in kvass can refresh the mind and relieve fatigue. In addition, amino acids, vitamins, reduce the complex high content produced during the brewing process of sugar stone. Molecular complexes and kvass are rich in a variety of beneficial bacteria, which have a significant effect on improving the digestion and absorption function of the human gastrointestinal tract. Kvass contains trace amounts of ethanol and a certain amount of carbon dioxide, which is a good product for cooling and relieving summer heat. It is also an appetizer, promotes body fluids, and A health drink that eliminates accumulated food and prevents and treats constipation