The plant commonly used to make tea is the Camellia sinensis. This evergreen shrub is the source of various types of tea, such as green, black, white, oolong, and herbal teas, depending on how the leaves are processed. The leaves of Camellia sinensis naturally contain caffeine, flavonoids, and other health-promoting compounds, making tea a popular beverage worldwide. Different regions, particularly in China, India, Japan, and Sri Lanka, cultivate this plant, contributing to the diverse flavor profiles and aromas associated with different tea varieties. Tea drinking also carries rich cultural significance in many societies.