Diet didn't work for me cos I live on junk food now but will change that soon,what worked for me wasstopped using any oils on my hair,literally everything had oil in it,so now I just wash my hair with head and shoulders and use apple cider vinegar as a conditioner and so far haven't had any cystic acne.I also realised that food had no relation at all to my acne,cos I eat what I want want now,although cutting out sugar is the best you can do for your skin. I still use Differin once a week and wash with Ce rave hydrating cleanser.