Dairy kefir is a cultured, lacto-fermented beverage/food that is teeming with health benefits. Kefir is rich in beneficial bacteria and yeasts, phosphorus, vitamin K, biotin, folic acid, mineralsand enzymes. Plus kefir is low in lactose. Kefir is akin to plain yogurt as they share a somewhat sour taste but kefir contains both beneficial bacteria and yeasts whereas yogurt only contains beneficial bacteria. One of my research articles listed 56 different strains of beneficial organisms and microflora! Compare that to the yogurt you bought at the grocery store that may contain 3 different strains.