Reprogramming the mitochondrial–circadian energy code with incretins

AbstractMitochondrial dysfunction, circadian disruption, and the accumulation of senescent cells converge to impair metabolic flexibility, a unifying phenotype of obesity and aging. We frame obesity as a nutrient-driven and aging as a time-driven expression of a disrupted mitochondrial–circadian energy code, with shared outputs: impaired substrate switching and flattened energy rhythms. This opinion argues that restoring code integrity, indexed clinically by gains in metabolic flexibility, should guide therapy. Beyond appetite and glycemia, GLP-1 (glucagon-like peptide-1) and dual GLP-1/GIP (glucose-dependent insulinotropic polypeptide) agonists may enhance mitochondrial efficiency, support circadian alignment, and temper prosenescent signaling across target tissues (muscle, liver, adipose, islets, and brain). We outline how node-specific and combination strategies (senolytics/senomorphics, mitophagy/NAD+ support, and chrono-entrainment) could reprogram systemic energy coordination, improve durability of response, and delay age-related metabolic decline.