this product worked. nasa knew bout this stuff for 40 years- race horses have been using it for over 15years-- my knees have been hurting and my elbows----i used this as per the instructions and i have NO PAIN- in my knees and joints---all i can do is tell you how much this product kicks butt- im waiting for pain to return cuase nothing is a cure these days---but i have no pain and its been months since i used it.