I first started MSM and did get weird dreams and some headaches.
I increased my water intake and then all that I noticed was MUCH thicker hair - not so much for the growth. Also, my hair seemed much "harder" and I had a lot of extra waves near my scalp?? I was told that was new growth?
I began taking Biotin 10,000mcg/day in addition to my MSM 2000 - 3000 mg/day & other supps. I then started getting pimples. So I started taking B-Complex vits, Vit C and drinking more water - about 80-96 oz/day, since the Biotin & MSM seem to dehydrate me.
Now, my hair and nails are growing much, much faster, stronger and thicker, my skin is glowing and the headaches have stopped. I wasn't trying to get thickness, but I guess it comes w/ the territory
Unfortunately, due to the excessive water intake, I make a lot more trips to the little girl's room, but It's Worth It!. If this keeps up, I plan on reaching my hair goal!! (I wish I knew how to post my picture(s).
Overall, both Biotin & MSM makes my hair grow faster & thicker. And because they are water soluble, I don't need to worry about OD'ing on them. Just remember, to drink as much water as possible!!