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System Decline

Meaning

The progressive, measurable deterioration of physiological function across multiple organ systems that typically occurs with chronological aging, characterized by a loss of homeostatic capacity and a reduction in functional reserve. In the hormonal context, this decline manifests as diminished endocrine gland output, reduced receptor sensitivity, and impaired clearance of metabolic byproducts. System decline significantly increases vulnerability to disease and reduces the ability to recover from stressors. It is the natural, unmitigated trajectory of biological aging.