Hi, first off, let me tell you that i am in no way qualified by any degree to give advice. All i can say is that we (my husband and i) have done a LOT of research about diet and how it effects your mood/behaviors and obviously, health. We also have a dr friend who does studies on nutrition and has answered many of our questions. i don't know his site but if you google dr. john lawton (of oregon) you should find a bunch of info to help you.
We have found that what the body digests determines it's alkalinity (if you've ever owned a fish tank you know this term) and acidity. your body can't go beyond i believe, 7.3(too much acid) or you die. plain and simple. so veggies, most fruits and a few other things keep you more toward nuetral/alkaline. and protiens (ie meats, beans, grains) put you towards acid. the thing is, your body will try to over compensate for a bad diet for a long time...eventually you develop health problems (ie weight issues, heart issues, some people say diabetis as well, but i don't know.) so the point is, your diet deffinatly affects your mood in that if your system is off balance, you don't feel as well and thus, might be crankier, or more depressed, or sluggish, or even more hyper (depending on the food) When your system is balanced, you're healthier and feel better. Sorry if i've confused you, our dr. friend is quite a bit better at explaining all this than am i, but hopefully that helped some:) good luck!~gen