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Aging is accompanied by progressive deterioration in physiological homeostasis, increasing vulnerability to metabolic, neurodegenerative, cardiovascular, and immune disorders. Over the past two decades, circadian biology has emerged as a central integrative framework linking environmental time cues to cellular, tissue, and organismal resilience. The circadian timing system (CTS), composed of a central pacemaker in the suprachiasmatic nucleus (SCN) and peripheral clocks throughout the body,...