I just read about MSM for tennis elbow. My elbow has been killing me for like 3 days. Cracking, snapping, just all around pain like you wouldn't believe. I don't play tennis or golf, I'm a plumber so I use my hands all day. I think it's from sitting at the computer with my elbow hanging off as I use the mouse. Anyways, I was ready to cut my arm off with a sawzall until I read about this MSM and decided to give it a shot. I went to the local Health store and they had come 15% pure MSM cream. Cost like $8.00 for a small bottle. Got home, still in pain and rubbed it on. Okay, so within like 1 minute...pain gone. I am not kidding, this really works! So whatever is in it totally works and I'm a believer. Magic bullet...pain gone! Still a little soreness but the aching, snapping is gone! Thanks Earth Clinic and your posts people! Love this site !!! Keep posting !!!!!