Green tea leaf extract

Green tea leaf extract is a mixture of bioactive compounds obtained from *Camellia sinensis* leaves, characterized primarily by high levels of catechins—especially epigallocatechin-3-gallate (EGCG)—along with other polyphenols, alkaloids (such as caffeine), flavonoids, amino acids, and minerals. The extract acts as a potent antioxidant and antimicrobial agent, with demonstrated ability to modulate various cellular and molecular processes through the activity of its polyphenolic components. While the extract itself is not a therapeutic target, many of its individual compounds (notably EGCG) are studied for their diverse biological effects, including possible roles in cancer prevention, inflammation reduction, cardiovascular protection, and more. However, the complex nature of the extract, variation in composition, and limited bioavailability of its primary active components present challenges for clinical translation[1][2][3][5][6].

Other names

Green tea extractGTEExtract of *Camellia sinensis* leaves

Antioxidant effect (mainly due to catechins protecting against free radicals); Modulation of cell signaling (EGCG and related catechins can inhibit NF-κB, MAPK, STAT1 pathways, etc.); Direct antimicrobial action (disruption of bacterial cell membranes, inhibition of bacterial enzymes); Metal ion chelation (scavenging reactive species and reducing oxidative damage).