I was taking 4000 mg. It made my hair very curly...and tangly at the root, but it also shed a lot less and seemed to grow a little faster. All the tight curls/tangles made it hard for me to get a touch up back in May and the hair did not process as well nor as quickly as it does when I don't take MSM.
I am currently trying 2,000 to see if I can stop the shedding.... and maybe have less tight curls.