Disclosed herein are green tea plant material extracts and methods of using the extracts comprising at least one green tea catechin selected from the group consisting of epi gallocatechin catechin epicatechin epigallocatechin 3 gallate gallocatechin gallate epicatechin 3 gallate catechin gallate and gallocatechin wherein the compositions of the disclosure provide greater bioavailability of at least one green tea catechin.