主题词：Tryptophan and brain disorders; Functional Brain Connectivity Studies; Stress Responses and Cortisol; Genetics and Neurodevelopmental Disorders; Genetic Associations and Epidemiology; Autism Spectrum Disorder Research; Neurotransmitter Receptor Influence on Behavior; Neuroscience and Neuropharmacology Research; Mental Health Research Topics; Bipolar Disorder and Treatment; Schizophrenia research and treatment; Neuroendocrine regulation and behavior; Epigenetics and DNA Methylation; Treatment of Major Depression; Attention Deficit Hyperactivity Disorder; Memory and Neural Mechanisms; Alzheimer's disease research and treatments; Neuroinflammation and Neurodegeneration Mechanisms; Child and Adolescent Psychosocial and Emotional Development; Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes; Neural and Behavioral Psychology Studies; Advanced Neuroimaging Techniques and Applications; Diet and metabolism studies; Neurogenesis and neuroplasticity mechanisms; Obsessive-Compulsive Spectrum Disorders