I recently stopped drinking altogether, I'm not an alcoholic, I just drank too much 3 or 4 times a week for years and decided to stop. After a few weeks not drinking I thought I'd do things in moderation and I had three pints of beer one night (my usual amount was about 5 pints on about 4 nights a week) and woke next morning to a severe depression. This subsided eventually but when I ate some pizza which I shouldn't have done (I have a gluten allergy) it came back. Now, whenever I eat even complex carbs I get a return of this awful depression which can last all day though sometimes it comes in waves and is varying in severity. Could it be that my insulin isn't doing what it should somehow, perhaps insulin resistance? I'm not diabetic but there is something wrong with my metabolism somewhere. Has anyone any advice, I'd greatly appreciate any? My blood tests came back fine but I have not had any for insulin monitoring or the like.