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Diurnal Cycle Integrity

Meaning

Diurnal Cycle Integrity refers to the precise, predictable, and robust synchronization of the body’s internal biological rhythms with the 24-hour cycle of light and darkness. This integrity is clinically observed through the appropriate and timely oscillation of key hormones, such as the morning peak of cortisol and the nocturnal surge of melatonin. Maintaining this rhythmic balance is crucial for energy regulation, immune function, and mental health.