What is Kefir
Kefir or kephir ( / k ə ˈ f i r / kə- FEER ), alternatively milk kefir , or búlgaros , is a fermented milk drink that originated in the north Caucasus Mountains made with kefir "grains", a yeast/bacterial fermentation starter. It is prepared by inoculating cow , goat , or sheep milk with kefir grains. Traditional kefir was made in goatskin bags that were hung near a doorway; the bag would be knocked by anyone passing through to help keep the milk and kefir grains well mixed. The word kefir , known in Russian since at least 1884, is probably of North Caucasian origin, although some sources see a connection to Turkic köpür (foam) or kef (foam that builds up on the surface of a boiling liquid). Kefir has become the most commonly used term, but other names are found in different geographic regions. ...