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
Argentine tea culture Argentine tea culture Argentine tea culture is influenced by local and imported varieties and customs. The country is a major producer of tea ("Camellia sinensis"), but is best known for the cultivation and consumption of mate, made with the leaves of the local yerba mate plant. When Jesuit missionaries first came to Argentina, they tried to ban the popular indigenous tea, "yerba maté", out of concern about its addictive qualities. They ultimately reversed their stance and began cultivating "yerba maté" on plantations in the Misiones province in particular (and elsewhere in South America), until the expulsion of the religious order