A year ago I started taking zinc tablets, each of 15mg, for the first 3 months I've found It good for my skin, after that, it started having the opposite effect, causing problems with my skin and this problem stopped as soon as I quit with this supplement. So maybe there's some kind of link

I also had issues with Zinc and I discovered it can have a two-fold effect that may worsen acne in some. One is that it can cause you to dump copper in excess into your bloodstream which can cause acne (zinc and copper compete and should stay balanced). I also read somewhere that zinc may raise androgen levels. At the time I was having issues, I did have a copper IUD, so I think that may have had something to do with it for me.