主题词：Tryptophan and brain disorders; Stress Responses and Cortisol; Gut microbiota and health; Bipolar Disorder and Treatment; Diet and metabolism studies; Neurotransmitter Receptor Influence on Behavior; Circadian rhythm and melatonin; Neuroinflammation and Neurodegeneration Mechanisms; Neuroendocrine regulation and behavior; Sirtuins and Resveratrol in Medicine; Mental Health Research Topics; Schizophrenia research and treatment; Maternal Mental Health During Pregnancy and Postpartum; Treatment of Major Depression; Fibromyalgia and Chronic Fatigue Syndrome Research; Biochemical Acid Research Studies; Calcium signaling and nucleotide metabolism; Sleep and related disorders; Pharmacogenetics and Drug Metabolism; Metabolomics and Mass Spectrometry Studies; Analytical Chemistry and Chromatography; Genetic Neurodegenerative Diseases; Immune cells in cancer; Long-Term Effects of COVID-19; Exercise and Physiological Responses