I listened to an incredible set of tapes about this supplememnt. It really didn't even speak much of it for joints. It talked mostly about the comination of MSM with Vit. C and its incredible healing affects for so many different things. Of course joints were mentioned, but on whole it was more about how the an imense amount of diseases are caused by lack of MSM, such as emphasiema. The main problem being in our life style today with all the preservatives and blah blah blah our diets seriously lack MSM. I don't know how many manufacturers of this supplemnt there are but this study seemed in no way related to any paticular comany. It all seemed very legite. Any one else hear of MSM used for anything besides joints? SOrry if my grammar and spelling are way off. I am runnign on minimum sleep right now.