What is total green tea extract green tea is a naturally occurring and highly effective antioxidant that has been used in chinese herbal medicine for thousands of years why use total green tea extract total green tea extract is a premium quality tablet providing 50mg of green tea extract equivalent to 1000mg of whole green tea our green tea extract is packed with active compounds standardised to 60 polyphenols 40 catechins and 8 caffeine polyphenols particularly epigallocatechin ga