Serotonin in the brain

The neurotransmitter serotonin (5-HT) plays an important role in many
physiological processes. In the brain it is involved in e.g. cognition and
mood, which are typically affected in clinical depression and anxiety disorder.
However 5-HT also seems to be a critical factor in other psychiatric disorders
such as gambling, ADHD and eating disorders. This webpage is designed to inform about acute tryptophan depletion (ATD), a method of temporarily lowering 5-HT in the brain, and summarize some of the clinical research areas ATD has proven to be useful in.