Kefir distinguishes itself from the well known FM
products, yoghurt, in that during its production the milk
undergoes a dual fermentation process under the action of
both lactic acid bacteria and yeast; while yoghurt can be
made from FM with lactic acid bacteria. Kefir can be
produced by fermenting milk with commercial freeze-dried
kefir starter cultures or kefir grains as well as the product
obtained after the removal of grains. It can be prepared
from many types of milk: cow, goat, sheep, coconut, rice,
and soy, but cow milk is commonly used. Traditionally,
kefir is homemade but the former product has been
commercialized in many countries