A study has been published which demonstrates some efficacy in the use of Pycnogenol (a deriviative of the bark from the French Maritime Pine) to treat inattention and hyperactivity. Subjects were either given Pycnogenol or a placebo for four weeks. Parents and teachers completed ADHD rating scales. After one month, teacher rating scales for subjects taking Pycnogenol showed an improvement in hyperactivity and inattention. According to the parent rating scales, there was an improvement in hyperactivity, but not inattention.

Trebaticka, Kopasova, et al. (2006). Treatment of ADHD with French Maritime pinebark extract. Eur Child Adolesc Psychiatry, published online 13May2006.