A wooden spoon and metal strainer sit above a glass jar full of kefir. After fermentation, kefir is poured through a strainer, leaving behind gelatinous grains ...

Kefir is a tangy, probiotic-rich drink made by fermenting cow’s or goat’s milk or water with a culture starter called kefir grains — small clusters of bacteria and yeast that resemble tiny cauliflower ...

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.

Fermented foods have been staples in the human diet since the dawn of time, but lately, it seems that they're having a moment, with new products popping up on shelves every week. From kimchi to ...