Caffeine and L-theanine may help children with ADHD

Caffeine and L-theanine, substances found in tea leaves, are known to improve sustained attention in healthy adults. In a new study examining the effects of these substances in children with Attention Deficit Hyperactivity Disorder (ADHD), researchers found five boys with ADHD showed better sustained attention, improved cognitive performance and decreased impulsivity when taking caffeine and L-theanine supplements together compared to a placebo. However, impulsivity increased when either substance was administered alone.