It may make your acne worse, that's quite possible.

I'm kinda anemic too, and the supplement made me break out, unfortunately. I'm trying to have a better diet, eat iron rich foods like liver, beef, sardines (i hate fish though), beans etc. But the level of my red blood cells wasn't very dangerously low - just if I continued having the diet I had, I would end up having serious problems.

But try taking supplements and see how your body reacts, maybe you're also better off getting your vitamins with food, than synthetic ones.