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[10] [11] Tea has one of the highest contents of flavonoids among common food and beverage products. [7] Catechins are the largest type of flavonoids in growing tea leaves. [6] According to a report released by USDA, in a 200-ml cup of tea, the mean total content of flavonoids is 266.68 mg for green tea, and 233.12 mg for black tea. [7]
Epigallocatechin gallate (EGCG), also known as epigallocatechin-3-gallate, is the ester of epigallocatechin and gallic acid, and is a type of catechin. EGCG – the most abundant catechin in tea – is a polyphenol under basic research for its potential to affect human health and disease.
These “green tea extract” pills are available online, packing as many as 800 mg of EGCG. ... though Johnston notes that most research in humans suggests that only 5% of green tea’s catechins ...
Catechin / ˈ k æ t ɪ k ɪ n / is a flavan-3-ol, a type of secondary metabolite providing antioxidant roles in plants. It belongs to the subgroup of polyphenols called flavonoids. The name of the catechin chemical family derives from catechu, which is the tannic juice or boiled extract of Mimosa catechu (Acacia catechu L.f). [1]
According to the experts in the Good Housekeeping Institute's Health, Beauty and Environmental Labs, "Green tea catechins may help protect skin from UV damage, but more research needs to be done ...
Green tea's weight-loss claims are centered around its effect on your metabolism, specifically that its catechins (a type of antioxidant, also known as EGCG) and caffeine can help speed it up ...