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Cortisol Ratio

Meaning

The Cortisol Ratio refers to the clinical assessment of cortisol levels measured at different, specific time points throughout the day, typically comparing the morning peak to the evening trough or analyzing the rate of decline. This ratio provides a far more nuanced understanding of the Hypothalamic-Pituitary-Adrenal (HPA) axis function than a single, static measurement. A healthy cortisol ratio demonstrates a proper diurnal rhythm, which is crucial for regulating sleep-wake cycles, energy metabolism, and immune function. Deviations, such as a flattened or inverted ratio, are clinical indicators of chronic stress or HPA axis dysregulation, impacting overall hormonal equilibrium.