What Is Kefir? Kefired milk (or Kefir; said as ke-fear), is the fermented dairy* product made from adding Kefir grains** (which are also known as Kefir; see picture above which shows kefir’s cauliflower-like appearance) into milk to ferment. The Kefir grains are a symbiotic culture of bacteria and yeast which exist on a structure of polysaccharide, protein, amino […]