I needed something to help me through the aches and pains from running and weightlifting. I was told to take a supplement with glucosamine. I search and came across Animal Flex. I've used Animal Paks before so I knew i couldnt go wrong with Animal Flex. I've tried it for a week now and can totally tell the difference in my body after my runs and workouts. My joints aren't aching like they used to be. My knees aren't giving me any pain after my runs. I still have the good sore you get after a hard work out but nothing compared to what it use to be. I definitely recommend animal flex!!!