I just started pantothenic acid a few weeks ago, at 7.5g a day. I only had a mild case of acne, but at 29, it's enough to piss me off. Killer results so far, though, skin is smooth and clear, much like when I was on Accutane, minus the nasty side effects. I'm going to continue this dose until the end of Sept, then lower it to about 2.5g/day.