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You are in: Green Tea Extract-EGCG
Time: 2013-3-15 23:57:56 From: herbal-ingredient.com
Extracts from green tea may block the formation of beta-amyloid plaques that have been linked to the onset ofAlzheimer's disease and other neurodegenerative conditions, according to new laboratory data.
The study, published in the Proceedings of the National Academy of Sciences, reports that green tea extract, and in particular the powerful polyphenol epigallocatechin-3-gallate (EGCG) prevented the formation of potentially dangerous beta-amyloid aggregates and broke down existing aggregate structures in proteins that contained metals - specifically copper, iron and zinc.The aggregation of these proteins, called metal-associated amyloids, is associated with Alzheimer's disease and other neurodegenerative conditions, explained the research team behind the study.A lot of people are very excited about this molecule, said Dr Mi Hee Lim from the University of Michigan, USA - who noted that EGCG and other flavonoids in natural products have long been established as powerful antioxidants.The majority of science on tea has looked at green tea, with benefits reported for reducing the risk of Alzheimer's and certain cancers, improving cardiovascular and oral health, as well as aiding in weight management.
Green tea contains between 30 and 40% of water-extractable polyphenols, while black tea (green tea that has been oxidized by fermentation) contains between 3 and 10%. Oolong tea is semi-fermented tea and is somewhere between green and black tea. The four primary polyphenols found in fresh tealeaves are epigallocatechin gallate (EGCG), epigallocatechin, epicatechin gallate, and epicatechin.