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 sinensis popular teas. "C. sinensis" var. "waldenae" was considered a different species, "Camellia waldenae" by SY Hu, but it was later identified as a variety of "C. sinensis". This variety is commonly called Waldenae Camellia. It is seen on Sunset Peak and Tai Mo Shan in Hong Kong. It is also distributed in Guangxi province, China. Three main kinds of tea are produced in India: Tea leaves are eaten by some herbivores, like the caterpillars of the willow beauty ("Peribatodes rhomboidaria"), a geometer moth. Although health benefits have been assumed throughout the history of using "Camellia sinensis" as a common beverage,