Epigallocatechin gallate (EGCG), also known as epigallocatechin-3-gallate, is a type of catechin and an ester of epigallocatechin and gallic acid. EGCG – the most abundant catechin in tea – is a polyphenol for its potential to affect human health and disease, under basic research. EGCG is used in many dietary additives. Epigallocatechin gallate (EGCG) is a unique plant compound that receives considerable attention for its potential positive health impact. Reducing inflammation, aiding weight loss, and helping prevent heart and brain disease, is thought. EGCG has poor absorption even at daily intake equivalent to 8–16 cups of green tea when taken orally, a quantity which causes adverse effects such as nausea or heartburn. EGCG blood levels peak within 1.7 hours after consumption. The absorbed half-life of the plasma is ~5 hours, but with most unchanged EGCG excreted from 0 to 8 hours into the urine.

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