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Natural Factors GreenSelect Phytosome (Green Tea — Camellia Sinensis) is a caffeine-free, standardized green tea extract that has undergone intensive toxicological and pharmacological scrutiny, demonstrating safety and verifying its high antioxidant activity. It is standardized to a very high polyphenol content (not less than 60%) with the most active polyphenol, epigallocatechin 3-0-gallate comprising at least 40% of the extract.