Doogh is a traditional yogurt-based drink that is popular in the Middle East, Central Asia, and the Caucasus. It is known by many names in different regions and languages. In Iran, it is called "mast-o-khiar," which translates to yogurt and cucumber. In Azerbaijan, it is known as "ayran," while in Turkey, it is called "yogurtlu ayran." In Armenia, it is referred to as "tahn," and in Georgia, it is known as "matsoni." Although the ingredients and preparation methods may differ slightly between these regions, the sour and refreshing taste of this drink remains a constant. Doogh and its synonyms are enjoyed as a refreshing drink or a side dish to meals.