I've suffered with acne for over ten years. Nothing has ever cleared it up for me- and I've tried everything except for accutane.
A couple of years ago, an endocrinologist suggested I go on vitamin d3 supplements for a deficiency. I was so deficient that I was prescribed 3 times the daily dose for 4 months and then twice the daily dose for the long term.
My skin miraculously cleared up for the first time ever, but as I have PCOS I put this down to a contraceptive pill finally working for me. When my vitamin d3 levels returned to normal I stopped the supplements altogether.
Within a year my acne started coming back with a vengeance and since it was after a miserable summer and horrible winter I guessed my vitamin d3 might be low again and started taking the supplements as before.
6 months later and I've stopped breaking out again. I just have the scars left to get rid of, but no active acne.
I have taken nothing else! Literally just vitamin d3! I introduced calcium & magnesium after reading that the three complement each other, but apart from that, it's just the vitamin d3 that I have to thank!
So, I'd urge you to try it, especially those who don't get much sun or have PCOS. These are common factors for a deficiency.
P.s- I have before and after photos- if anyone wants to see, message me. I can't work out how to post them from my iPhone!