Tea is an aromatic beverage commonly prepared by pouring hot or boiling water over cured leaves of the Camellia sinensis, an evergreen shrub native to Asia. After water, it is the most widely consumed drink in the world. It originated in Southwest China, where it was used as a medicinal drink. It was popularised as a recreational drink during the Chinese Tang dynasty, and tea drinking spread to other East Asian countries. Portuguese priests and merchants introduced it to Europe during the 16th century. During the 17th century, drinking tea became fashionable among Britons, who started large-scale production and commercialisation of the plant in India to bypass the Chinese monopoly. Combined, China and India supplied 62% of the world's tea in 2016. There are many different types of tea having vastly different profiles that include sweet, nutty, floral or grassy, cooling, slightly bitter and astringent notes and flavours. A 100g serving of tea provides approximately 1 calorie; 11mg of caffeine, 0.1g of protein, 18mg of potassium and 4mg of sodium.