Biological Age

Epigenetic Clocks Explained

How DNA methylation patterns estimate physiological aging.

Monika Mikulicz-Pasler·MD, PhD10 min read
Molecular diagnostics visualization

Epigenetic clocks measure patterns of DNA methylation — chemical tags that regulate gene expression without altering the genetic sequence itself. Certain methylation sites change predictably with age, allowing algorithms to estimate a person's biological age relative to their chronological age.

From research to clinic

The Horvath clock and its successors have been validated across large population datasets. Accelerated epigenetic aging correlates with increased risk of cardiovascular disease, cognitive decline, and all-cause mortality in observational studies. However, correlation in populations does not automatically translate to actionable individual guidance.

About the author

Monika Mikulicz-Pasler

Medical Director, KCM Clinic · Specialist in Cardiology & Internal Medicine·MD, PhD

Dr. Mikulicz-Pasler leads physician-guided longevity care at KCM Clinic, with deep expertise in cardiology, internal medicine, and preventive health strategy. A member of the Polish Society of Longevity Medicine, she focuses on early interpretation of cardiovascular and systemic risk — translating advanced diagnostics into clear, personalized pathways for healthier aging.

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Strong evidenceAging Cell

Epigenetic Age Acceleration and All-Cause Mortality: A 15-Year Prospective Cohort

A landmark cohort study demonstrates that epigenetic age acceleration — measured via the GrimAge clock — independently predicts all-cause and cause-specific mortality over 15 years of follow-up.

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