Every morning, while the kettle heats the water for my coffee and my two-year-old slurps her Cheerios, I feed and strain my kefir grains. The grains—small, squishy clumps that resemble cauliflower ...

Kefir is a simple fermented drink made by mixing milk with kefir grains. According to a study published by Frontiers in Microbiology in 2015, kefir grains contain natural bacteria and yeast. As it ...

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.