wow, I have to say thats an amazing story. what form of wheatgrass are you using? fresh or powdered?
as for your son's ADHD, make certain he is getting enough fat and vit D, very critical! fat is the most important nutrient for the brain, especially omega 3 fats from fatty fish, fish oil, flax seed, hemp seed oil, egg yolks, olive oil, etc.
phosphatidylserine is another nutrient to look into.