Phenolic content in tea green tea. Catechins constitute about 25% of the dry mass of a fresh tea leaf, although total catechin content varies widely depending on species, clonal variation, growing location, season, light variation, and altitude. They are present in nearly all teas made from "Camellia sinensis", including white tea, green tea, black tea and oolong tea. Of all the catechins in tea, EGCG is the main subject of scientific study with regard to its potential health effects. 4-Hydroxybenzoic acid, 3,4-dihydroxybenzoic acid (protocatechuic acid), 3-methoxy-4-hydroxy-hippuric acid and 3-methoxy-4-hydroxybenzoic acid (vanillic acid) are the main catechins metabolites found in humans after consumption of green
Indian tea culture tribe, inhabitants of the regions where the "Camellia sinensis" plant grew native, have been consuming tea since the 12th century. It is also possible that tea may have been used under another name. Frederick R. Dannaway, in the essay “Tea As Soma”, argues that tea was perhaps better known as “Soma” in Indian mythology. The tea plant is native to East Asia and the Indian subcontinent, but the origins and history of tea are not precise. Many of the origin myths for tea are found in Chinese mythology, and the first verifiable records for tea consumption also point towards China.