Biological Age vs Chronological Age: What's the Difference?

Most people know their chronological age. Far fewer know their biological age.

Chronological age measures the number of years you have been alive. Biological age reflects how your body is functioning today.

This difference helps explain why some people remain healthy and active well into older age, while others experience health challenges much earlier.

A variety of factors can influence biological aging, including physical activity, nutrition, sleep quality, stress, genetics, and metabolic health.

Scientists use different tools to estimate biological age, including aging biomarkers, physical performance measures, and increasingly sophisticated biological assessments.

Although no single test can perfectly define biological age, the concept provides a broader picture of health than chronological age alone.

Rather than asking "How old are you?", biological age encourages a more meaningful question:

"How healthy is your body today?"