The quantifiable divergence between an individual’s measured chronological age and their physiological or biological age, as determined by functional biomarkers. A significant positive discrepancy implies a state of accelerated biological aging relative to time elapsed since birth. Conversely, a negative discrepancy suggests a preserved or optimized physiological state.
Origin
This term stems from the field of gerontology and longevity science, where researchers seek metrics to accurately gauge functional decline independent of mere calendar years. It quantifies the success or failure of lifestyle and medical interventions in slowing the rate of physiological entropy. The discrepancy highlights the variable impact of life history on the body’s machinery.
Mechanism
The discrepancy is calculated by comparing standard clinical age against scores derived from panels assessing epigenetic clocks, telomere length, or comprehensive hormonal panels, such as SHBG and free T3 levels. When systemic inflammation or chronic stress impairs cellular repair mechanisms, the biological age advances faster than the chronological age. Reducing this gap involves systemic stabilization and enhancing recovery efficiency science.
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