Effects of L-theanine and Caffeine on Attention and Attention-related Brain Activity of Children With Attention Deficit Hyperactivity Disorder

Oral administration of 2.5 mg/kg body weight of L-theanine dissolved in 100 ml of water

Oral administration of 2.0 mg/kg body weight of caffeine dissolved in 100 ml of water

Oral administration of a combination of 2.5 mg/kg body weight of L-theanine and 2.0 mg/kg body weight of caffeine dissolved in 100 ml of water

Oral administration of 100 ml of water