What are the traditional ingredients for Tibet's beer?

Traditional Tibetan beer, known as "chang," is typically made from barley, which is the primary ingredient. The brewing process also involves water and a fermenting agent, often using barley malt or sometimes a type of yeast. In some variations, other grains like millet or wheat may be added, and the beer is often flavored with herbs or spices. Chang is traditionally consumed in social settings and ceremonies, reflecting Tibetan culture.