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TL;DR
This editorial introduces a Frontiers in Nutrition special topic on chrononutrition, summarizing evidence from narrative and systematic reviews, epidemiological studies, preclinical experiments, and clinical interventions on circadian biology, meal timing, and metabolic outcomes. The central finding across collected studies is that chrono-disruptive eating behaviors are associated with adverse cardiometabolic and sleep outcomes, while aligned meal timing and dietary chronobiotics may help synchronize internal clocks and support metabolic homeostasis.