Scientists Back Biological Age Clocks, Warn Single Scores Can Mislead by 10 Years
Updated
Updated · Forbes · Jun 23
Scientists Back Biological Age Clocks, Warn Single Scores Can Mislead by 10 Years
1 articles · Updated · Forbes · Jun 23
Summary
Biological aging clocks can meaningfully measure how fast people are aging and help predict disease risk, researchers said, pointing to tools such as GrimAge for cognitive decline and iAge for heart disease and frailty.
Single consumer-facing scores can still mislead because most tests capture only one facet of aging, while estimates also shift with timing, activity and methodology rather than reflecting a fixed whole-body age.
10-year older readings have triggered psychological crises in some patients, scientists said, arguing results should be interpreted with multiple clocks and functional metrics such as VO2max instead of one headline number.
2025 research on German soccer players showed DNA-methylation clocks made athletes look younger immediately after a match, with readings returning to normal hours later.
Scientists said the market now ranges from promising preventive-medicine tools to unreliable proteomic tests and unvalidated selfie or survey apps, strengthening calls for consumer guidance, regulation or international certification.
Your organs age at different rates. Which biological clock is the most critical predictor of your future health?
Beyond diet and exercise, what new science-backed habit can most effectively slow down your biological clock?
Will 'Longevity Medicine' extend health for all, or create a new health divide based on wealth?
Measuring Biological Age: The Science, Uncertainties, and Ethical Dilemmas of Aging Clocks
Overview
Biological age clocks aim to measure how our bodies are truly aging, rather than just counting years. While scientists have made great progress with tools like epigenetic and transcriptomic clocks that track molecular changes, these methods are a double-edged sword. They are powerful for research and help reveal patterns in aging, but they have big limitations for personal use. Results can be inconsistent and confusing, making it hard for individuals to trust or act on them. This complex reality means biological age clocks are valuable for science, but not yet reliable for guiding personal health decisions.