From the Manufacturer:
Animal Flex is a joint and ligament formula designed to help support the health of athlete's joints from the continuous wear and tear brought about by heavy weight training. Animal Flex has been formulated specifically for strength athletes such as bodybuilders and powerlifters. Each pack consists of several different complexes designed to help support healthy joints, ligaments and tendons. Animal Flex is complete and best of all, it requires only a single dose per day.