Sour-milk drinks appeared thanks to the nomadic life of Turkic cattle-breeding peoples. Their way of life implied long passages, in which dairy products had to be stored for a long time without spoiling. It was in such conditions that the principles of spontaneous fermentation were discovered, which became the basis for many drinks: koumiss, ayran, shalap, shubat, yogurt and kefir.
Even the ancient Roman historians Pliny and Flavius described “thick and very tasty dairy products” made by the Turks. These references are among the first evidence of early forms of fermented dairy products.