I wanted to comment on Vitamin D after I've been using it for awhile and would have a strong basis for an accurate review. Although I'm seeing a lot of positive reviews I wonder how many of these will change after a longer period of use. Whether it be the placibo effect, randomness of your acne cycles, whatever, vitamin D had no real benefit for me.
I'm a white male in my early 30s with mild/moderate acne. I had bad acne in high school; Accutane was the only solution I found, but after a 10 year period of relatively clear skin, I've now been experiencing the occasional breakouts. Before I go back to Accutane, I wanted to see if there were cheaper and less 'last resort' methods of cleaning up my skin. Initially I tried Vitamin D with fish oil, then just vitamin D on it's own with a generalized multi-vitamin I had already been taking. In the first few weeks I thought Vitamin D was working, but after 5-6 weeks my skin reverted back to where it was pre-vitamin D, so I discontinued it after 60 days.
Maybe this worked for others, it had no positive effects for me; since this is an 'acne forum' I'm rating it a 2 out of 5. Feel free to give it a shot, what the hell, it's cheap - just don't expect miracles.
I'm gonna try that acne script next, so look for my review there in a few months, lol!