Coffee is a brewed beverage made from roasted coffee beans, which grow on trees cultivated in over 70 countries around the world, primarily in Latin America, Southeast Asia, and Africa. Coffee beans are one of the most traded agricultural commodities globally. Coffee can affect humans due to its caffeine content. It is one of the most consumed beverages worldwide. While coffee's energizing effect was first discovered in Ethiopia, cultivation first occurred in southern Arabia; the earliest credible evidence of coffee drinking appears in the mid-15th century in the Muslim shrines of Yemen.