Hey guys, just thought I would chime in with my observations as a relatively experienced user of msm. I started taking this stuff primarily to speed up hair growth/results and for the bone/joint health as a recreational weightlifter.
I can honestly say that it has speed up my hair growth and it does prevent joint pain from the heavy lifting days. As for RE-growth, I can only attribute that to the other stufff in my regimine since their is not much info on its effect on hairloss. The important thing is the dosage. For me (160lbs) , it takes 3000mg to have any noticible positive effect. I once dropped down to 2000 and experienced somewhat slower growth. Then, Jayman pointed out to me the 3000 mg threshhold (I don't know where this comes from) and so I went back up to that - noticibly faster growth ensued. When I find some higher strenght capsules, I will go up 4-5000 mgs if possible - thats how sold I am on this stuff!
*There is also something else about this stuff that came as a pleasant surprise. Prior to taking it, I had one of those toenails that started looking like, you know, the disgusting yellow/thick/crud...toenail fungus problem. After using msm for about a month, I could see a distinct improvement in its condition. After 4 months, there is absolutely no trace of that nasty-looking $hit!
I wasn't using it at all for this purpose - this came as a "side-effect". It was only after noticing that I tried to do some more research on it - couldn't find anything on the fungus thing. So, I don't know what explains it but I know for me it was the msm - it is the only other wierd thing in my diet not listed in my regimine.
Been on it 4 months now - wouldn't drop it w/o good cause.