Kefir, pronounced kee-feer, is a drink made from the fermented milk from a cow, goat, or sheep. Water kefir is similar but has a water base instead of milk. Kefir grains have yeast and good bacteria.

Kefir is a probiotic-rich drink made from milk and kefir grains. Benefits of kefir include supporting gut health, strengthening bones, and helping with weight loss. However, kefir may carry some risks ...

Consumer Reports has no financial relationship with any advertisers on this site. For several years now, foods that are said to promote gut health have been wildly popular. You see probiotic-enhanced ...