Question 1

What is biological age and how is it different from chronological age?

Accepted Answer

Chronological age is simply how many years you have existed since birth. Biological age (epigenetic age — estimated from DNA methylation patterns and physiological biomarkers) measures how efficiently your body's cells and organs are actually functioning. Two people who are both 50 years old chronologically can have biological ages of 40 and 65 respectively, depending on their genetics, lifestyle, and health habits. Biological age is a significantly stronger predictor of mortality and disease risk than chronological age. [Journal of Gerontology, 2025]

Question 2

How accurate is this biological age test?

Accepted Answer

This assessment uses self-reported proxy biomarkers that correlate with chronological age at r=0.81–0.86 in validated population studies (JMIR Aging, 2022). The gold standard — DNA methylation epigenetic clocks (Horvath, 2013) — requires a laboratory blood sample and costs £200-500. Our proxy approach provides a directional estimate that is clinically meaningful without requiring any equipment or blood draw. Treat your result as a scientifically informed estimate rather than a precise clinical measurement.

Question 3

Can I actually reduce my biological age?

Accepted Answer

Yes — significantly. A randomized controlled trial by Fitzgerald et al. (Aging, 2021) demonstrated a 3.23-year reduction in biological age in just 8 weeks through dietary changes, sleep optimization, exercise, stress reduction, and supplementation. Regular aerobic exercise alone has been shown to reduce biological age markers by 2-5 years in 6-12 months of consistent practice. Biological age is the most modifiable metric in aging science.

Question 4

What is the Horvath epigenetic clock?

Accepted Answer

The Horvath clock, published in Genome Biology (2013) by Steve Horvath at UCLA, is considered the gold standard for biological age measurement. It uses DNA methylation patterns — chemical modifications to your DNA that change with age — to estimate biological age with high accuracy across multiple tissue types. Our proxy biomarker assessment correlates with epigenetic clock measurements but does not directly measure DNA methylation.

Question 5

How often should I retake this assessment?

Accepted Answer

Every 3-6 months after making significant lifestyle changes. Resting heart rate, blood pressure, and physical fitness markers can change within 4-8 weeks of consistent intervention. Retaking every quarter allows you to track meaningful progress across all 12 biomarkers.

Question 6

Why does BornClock use WHO Asian BMI thresholds?

Accepted Answer

The WHO convened an expert consultation in 2004 (published in The Lancet) which found that Asian populations show higher risk of metabolic complications at lower BMI values than Western populations. The standard BMI overweight threshold of 25 was developed primarily from European population data. For South Asian, East Asian, and Southeast Asian populations, the WHO recommends an overweight threshold of 23 and obesity threshold of 27.5.

Question 7

Is biological age the same as 'body age'?

Accepted Answer

Body age, fitness age, and biological age are related but distinct concepts. Fitness age specifically measures cardiovascular capacity (VO₂ max). Biological age is a broader measure incorporating multiple physiological systems. Body age is a general consumer term for the same concept. BornClock measures a composite biological age using 12 biomarkers across cardiovascular, musculoskeletal, neurological, metabolic, body composition, and vitality domains.

Question 8

What should I do if my biological age is significantly higher than my chronological age?

Accepted Answer

First: do not panic. Biological age measurement has inherent variability and self-report limitations. Second: use this as motivation, not a medical diagnosis. Focus on the top 3 improvement opportunities shown in your results above. Third: if your blood pressure reading was 140+ or you have concerns about any specific result, consult a healthcare professional. This tool cannot replace clinical assessment for serious health concerns.

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What Is Your True Biological Age?

What is my biological age?

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