Yes, when I first started using zinc, it was like a miracle for me, my acne almost diminished. That was a year ago, now my acne still likes to pop up all the time in the same spots like in a cycle, but not as bad.
I must also note that I was also taking some other vitamins and then during this last summer I started over doing it and thought "more is better", but my acne really got bad again 'yet I was still on zinc 50-70mg per day. I think it was do to overdosing on the B complex vitamin mainly and maybe some other stuff.
Then about 2-3 months ago I finally went back to normal with same amount of zinc and my acne got better, but like I said above, I still get pimples on my face and my back is another story (it can get really bad regardless).
But yeah, I think zinc can help with a very notible difference.
I take 50mg a day. It definitely makes the life of the pimple a lot shorter! As for developing pimples, I don't think it helped very much with them. But I would definitely recommend it to help heal them faster.
I take 50mg daily. It makes the zits heal faster. I have moderate acne. Pustules on cheekbone area and also chin and jawline area and whiteheads (on the forehead). It took a few weeks before i realized that the zits were coming the surface sooner. Now all I have to do is stop picking....