I believe this...I noticed after being off of chocolate a couple of weeks, when I had a few handfuls of M&Ms, the next day I was a bear...I always wondered if milk chocolte was affecting my mood, making me cranky & very depressed.
So I have stayed off of all milk chocolate and only have a piece of Dove dark chocolate once in a while. No cookies, cakes, etc. the past few weeks. While I am weepier after being taken off of Nudexta, I don't feel as cranky or depressed...far from it, actually.

It is so difficult giving up something you crave...chocolate has been a drug for me. Oh well...gotta grow up sometime

I also have watched "Supersize Me", where Morgan Sprulock ate nothing but McD's for 30 days. He became extremely depressed...wonder what's in fast food that would be a mood changer?