The oldest written account of the drink is under the name buχsum and is attested from the 1073 Middle Turkic dictionary Dīwān Lughāt al-Turk by Mahmud al-Kashgari.The drink under the name boza is first attested in Abu Hayyan al-Gharnati's early 14th century Kipchak Turkic work Kitab al-'idrak li-lisan al-'atrak [4] Fermented cereal flour (generally millet) drinks have been produced in Anatolia and Mesopotamia since the 9th or 8th millennia BCE, and Xenophon mentioned in the 4th century BCE how the locals preserved and cooled the preparations in earthen pots that were buried.It contained only a low level of alcohol, so as long as it was not consumed in sufficient quantities to cause drunkenness, it was tolerated as a warming and strengthening beverage for soldiers.Measuring boza samples made from maize, wheat, and rice flours, researchers determined an average of 12.3% total sugar, 1.06% protein, and 0.07% fat.Serbia, Montenegro, Bosnia and Herzegovina, Kosovo, Bulgaria, Albania, and North Macedonia produce boza as a refreshing beverage year-round.