Diet is critical, IMO.
There are many food sensitivities that can get a kid labeled as ADD/ADHD.
My son is very sensitive to artificial vanilla flavoring. Whenever he got it he would go into high gear and bounce off the walls to the point where he would be flushed red in the face and sweat soaked.
No doubt on a public school diet he would have been unmanageable and on drugs.
At home, whenever he got antsy, I would let him go outside and burn off the energy splitting wood. Of course, during swim team season, that was unnecessary. Nightly practice and meets on weekends kept all the kids much easier to deal with, although they did eat us out of house and home.
But a week after swim team was over,....... sigh.....
Physical activity is way underrated in considering a child’s behavior issues.
BTW, we sprung for the extra expense of using real vanilla extract and I made most of my own stuff from scratch. Rarely used box mixes.
It was worth it.
If I were a child today, I would probably be “diagnosed” with something, and my parents pressured to put me on drugs.
Fortunately, that didn’t happen “back then”.