PS.....I've three grown up "kids" who all went through the acne stage. The two girls had no problems as they were prepared to listen to Mum and cut down on the alcopops and burgers....
My boy had bad acne for a while, simply because he wouldn't put in the effort to amend his lifestyle - ever tried getting a 6ft3in rugby player to cut out the beer and the takeaways??? - but that's another issue?!