Topping our list of supplements to help ADHD impulsivity is zinc which is believed to reduce this troublesome ADHD behavior rather significantly, especially when taken in conjunction with the psychostimulant drug Ritalin. At the time of writing (March 2011) nine separate studies - including one carried out and reported in the journal "Nutrition Reviews" by Natalie Sinn, a research fellow at the University of South Australia School of Health Sciences - concluded that children with an attention deficit disorder have lower levels of this essential mineral.
This is our first clue to discovering that using it as a supplement might reduce the negative consequences of exhibiting impulsivity when the body, and more importantly the brain, doesn't have enough of it. Deductive reasoning alone can lead researchers to the conclusion that since a psychiatrically normal brain without ADHD doesn’t have a deficiency of Zinc, lower levels in someone who does have ADHD might have something to do with the impulsivity.
But, of course, due to the complex nature and composition of the brain and the many chemicals, molecules, and minerals that play a role in ensuring it functions properly, scientists need more to go on to establish the link between Zinc and impulsivity. And they do.
Zinc is critical for the regulation of the neurotransmitter dopamine in the brain, which plays a part in monitoring the process of evaluating risk and reward. According to an article in Scientific American, researchers believe that people who are more impulsive (especially those with ADHD) might have less active dopamine receptors in their midbrain region. This faulty dopamine circuit in the brain could explain rash behavior where people spend less time considering the consequences of their actions.