I think this article understates one point. ADHD is already known to be highly heritable, which already tells you genes are involved. http://i.imgur.com/G7jDX.

I think this article understates one point. ADHD is already known to be highly heritable, which already tells you genes are involved. http://i.imgur.com/G7jDX.png http://i.imgur.com/G7jDX.png Also, the first association between ADHD and polymorphisms affecting the dopamine transporter was found in 1995. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1801209/ http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1801209/