Special Section: Metabolic Psychiatry

Editorial introducing 'metabolic psychiatry' as a defined research field studying the interrelationships among nutrition, metabolic function (brain metabolism, insulin sensitivity, body weight), inflammation, and mental health across the lifespan. Surveys a special issue's findings spanning lipid biomarkers in bipolar disorder, vascular risk in depression, maternal cardiometabolic effects on offspring mental health, and gut-microbiome interventions, and calls for larger prospective and combined human-animal studies to establish causality.