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
Camellia taliensis Camellia taliensis Camellia taliensis (also Yunnan large leaf varietal tea, wild tea, 大理茶) is a species of evergreen shrub or small tree whose leaves and leaf buds are used to produce tea. It is of the genus "Camellia" of flowering plants in the family Theaceae. "C. taliensis" is an important wild relative to the cultivated the tea plant "Camellia sinensis." It also belongs to the same section "Thea" as "C. sinensis." It is an endangered species due to human overpopulation causing fragmentation of the plant's natural habitat and from overpicking of the leaves for the tea market. "Camellia talensis" has