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
Kangra tea Kangra tea Kangra tea is a tea from the Kangra district in Himachal Pradesh, India. Both black tea and green tea have been produced in the Kangra Valley since the mid-19th century. Kangra tea was given the Geographical Indication status in 2005. Tea was first grown in the Kangra region in the mid-19th century. After a feasibility survey in 1848 showed the area of being suitable for tea plantation, a Chinese variety of "Camellia sinensis" was planted across the region. The production turned out to be successful in Palampur and Dharamshala, despite failing in other locations. By the 1880s, the