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
Chinese tea is also called Lu'an Melon Seed tea, is used for Chinese medicine. It cannot release its aroma and has a bitter taste if it is not baked right. The inherent quality of this tea is considered quite good. This type of tea is especially suitable for people who are suffering from gastric problems. Lu'an tea is still produced in China, Anhui Province, China. The Lu'an tea from the Bat Cave of Jinzhai County is considered of superior quality, as thousand of bats in the cave can provide an ideal fertilizer for the tea plants. Songluo tea is manufactured at Songluo