I enjoy reading your posts.
It's well known that three meals a day are not adequate for most people.
Snacks in between meals are recommended and I wholeheartedly believe that our children must wait too long for nourishment in school from the time they have breakfast in the morning until they have lunch and then arrive home.
Concentration is not at its' height when one is HUNGRY and this could contribute to what doctors consider ADD/ADHD, but then again, my other theory is that our fast paced society, technology, fast moving images (videos), etc. have contributed, as well, to lack of concentration and what the medical community defines as ADD/ADHD.
In other words, ADD/ADHD created through environmental factors.