I've been dealing with acne for about 7-8 years. I've had different types, and for the past 2 years I've been getting mostly cystic acne on my face. It started out on all areas of my face, but over the past 6-8 months I have basically only had issues on my forehead. MY cheeks and around my mouth are mostly clear. I would describe my skin as moderately severe, with 3-4 new cyst per week on my forehead.
Anyways, I'm 1 month away from trying accutane as a last resort, but before doing so, I am trying to test for food allergies. I've been mostly gluten free for the past 3 weeks (I've been dairy free for over a year). The first week I did not have any breakouts and I was really excited that I may have found the cure to my cystic acne. However, on week 2 I had a bad breakout. I'm still on a gluten free diet and my skin has been the same that it usually is. 4-5 clear days a week, 2-3 bad days. I keep reading about different foods that may cause breakouts and I'm continually taking things out of my diet, but I haven't had much success yet.
As I continue changing my diet, my question is how long should it take for food to cause a breakout? If I breakout, is it a result of something I ate 2 or 3 days ago, or something I ate within the past 24 hours? Any insight or thoughts would be appreciated. Thanks.