I take 2g of msm every morning. Started taking it for knee pain while secretly hoping for hair growth.
What i got: insomnia (was taking a 1g at night and insomnia stopped when i stopped doing that)
no knee pain and nothing else.
My nails are still pretty weak, grow slowly and break easily, and i haven't noticed any changes to my hair.
I take evening primrose oil alt w flaxseed oil and vit c and a multi-vit so i can't attribute my awesome skin to msm.
My knee pain is gone and if i skip a dose for a day or two the pain quickly reminds me.
I'm planning to take a 2nd dose later in the day but the insomnia was so awful i'm scared