Biological Age Test
Answer a few quick questions about your habits and lifestyle to estimate your biological age and see how it compares to your actual age.
First, the basics.
Your age is the number everything else is compared against.
Your height and weight.
Used only to work out your BMI band. Nothing is stored or sent anywhere.
Do you smoke or vape nicotine?
How much moderate or vigorous exercise do you get in a week?
Anything that raises your breathing counts: brisk walking, cycling, lifting, sport.
How would you describe the way you usually eat?
Judge it across a normal week, not your best week.
How many alcoholic drinks do you have in a typical week?
One drink means a small glass of wine, a single measure of spirits, or half a pint of beer.
How many hours do you usually sleep a night?
How often do you feel stressed or overwhelmed?
How connected do you feel to friends, family or community?
What this test is, and what it is not
This is a wellness estimate based on published lifestyle research, not a medical test. It cannot diagnose anything and it does not measure your cells. Properly validated biological age testing uses blood biomarkers. Speak to a doctor about your health.
What it does do is compare your habits against the relationships researchers have measured between those habits and how long people live. The five factors with the strongest evidence come from a 2018 study in Circulation, which followed two large groups of American adults and found roughly 12 to 14 years of difference in life expectancy between people with all five healthy habits and people with none of them.
| Factor | Why it is included |
|---|---|
| Smoking | The single largest modifiable factor. Most of the gap is recoverable by quitting early. |
| Movement | Meta-analyses put the gap between inactive and highly active adults at roughly 3 to 4 years. |
| Diet | One of the five low-risk factors in the Circulation study. |
| Alcohol | Scored so that abstaining is never worse than drinking. |
| Body weight | BMI, using the same healthy range the study defined. |
| Sleep | Risk is U-shaped: both short and long sleep track with higher mortality. |
| Stress | Chronic stress carries its own independent association. |
| Connection | Social isolation sits alongside several established physical risk factors. |
The total adjustment is capped at 12 years younger and 15 years older, and the estimate never falls below 18. Without those limits an extreme set of answers produces numbers that are alarming and impossible to defend.
Muscle is one of the strongest markers of how well you age, and protein is what preserves it.
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