Joe- none of the studies on sugar and kids with ADD really seemed to pan out. That being said, we all know that a diet high in refined carbs can lead to blood sugar swings, and every parent knows a hungry child with low blood sugar can get pretty irrational! Also, a diet that is low in protein may not provide enough of the precursors needed for most neurotransmitters. I think overall, a balanced diet with whole foods would probably help a lot of kids.
As far as your D goes, though - do get her =screened for celiac disease. In some people it can have effects on the brain - even so far, in extreme cases, as causing calcifications in the brain or psychosis. These are really rare, but given your family history, it would be good to know she doesn't have this problem.
