Kefir for Health: A Fermented Alternative to Yogurt

I managed to give myself a yeast infection with an overzealous attempt at home-brewed root beer. I don't know how serious this sort of infection is, but I finished it off by drinking lots of water and lots of a cultured yogurt product called kefir. The idea was to flush the yeast, dead or alive, out of the gastrointestinal system and replace/combat it with the bacteria in the cultured kefir drink.