This Oerkefir from organic raw milk is fermented with real kefir grains. The rich microflora of bacteria and yeasts, living in the coral-like structure of the grains produces a powerful probiotic dairy drink. In its area of origin in Tibet and the Caucasus, oerkefir is called the drink of the 100-year-olds. The milk comes from grass-fed cows and is produced without antibiotics. Fermentation for 36 hours creates a safe product.