Some approaches which are most useful seem to be: Magnesium, Green Tea &/OR L-Theanine, GABA, SAMe, Milk Thistle, Fish Oil, Cholesterol, Vitamin D (Sunlight), etc.
I would say there is no silver bullet. But I would say unambiguously that vitamins and minerals and occasionally herbs are low hanging fruit compared to a pharmaceutical approach. Drugs aren't used as "building blocks" in cells or biochemistry. Drugs modulate various activity in our body which can help but typically is not without some kind of side effect or not as affective as providing enough of the "raw materials" our body needs.
Attention Deficit Hyperactive Disorder definitely exists although the way it's predominately treated really doesn't help solve the deeper causes of the disorder.