Russian kvass saved a lot of people

Since ancient times, people have noticed unusual properties of kvass. He not only perfectly refreshed, relieved of thirst, but also helped to recuperate after hard work, and also relieved of beriberi and scurvy. Not only traditional healers advised to use this drink for certain diseases, but also traditional medicine favored kvass. Not in vain in hospitals and hospitals brewed their own drink, popularly called hospital kvass.