GABA GABA supplements have also been proposed for improving concentration in attention deficit hyperactivity disorder (ADHD) and .... although it remains untested for these purposes. http://www.wholehealthmd.com/refshelf/substances_view/1,1525,10027,00.html
GABA: Mania and Seizures to Relaxation and Impulse Control Low levels of GABA are also associated with problems of poor impulse control. When GABA is low in the brain, impulsive behaviors are not inhibited (stopped) by logical or reasonable thinking. http://www.enotalone.com/article/4118.html
Imaging children with ADHD: MRI technology reveals differences in neuro-signaling Our data show children with ADHD had a two-and-half-fold increased level of glutamate, an excitatory brain chemical that can be toxic to nerve cells. The data also suggest a decreased level of GABA, a neuro-inhibitor. This combination may explain the behavior of children with poor impulse control. http://www.healing-arts.org/children/ADHD/mri-imaging.htm
Nutrition Basics: Amino Acids - Gamma-Aminobutyric Acid (GABA) GABA is effective in treating attention deficit disorder (ADD) and attention deficit hyperactivity disorder (ADHD). GABA supplements have been proposed for improving concentration in ADHD, but has remained untested for this purpose. http://www.moondragon.org/health/nutritionbasics/aminoacids/gaba.html