Boza is a thick drink, slightly alcoholic, with a sour- sweet taste, that varies depending on the amount of sugar added, and the fermentation length. Boza is an amazing fermented drink, which contains a lot of probiotics, vitamins A, B, and E, in a highly bioavailable form, and it caries all the health benefits of a probiotic drink. In most of the Eastern European countries, the drink it is called boza, after the Turkish name, where it originates apparently, or braga in Romania. There is also a similar recipe made from bread, called kvass, and that recipe was firstly brewed by Russians.