Your birth year is fixed. Your biological age isn't.
Discover the age your body is actually functioning at — and the exact levers to change it. Based on the same physiological markers used in longevity medicine.
- VO2 max proxy from resting heart rate + training frequency
- HRV input from any wearable (Whoop, Oura, Garmin)
- Sleep architecture and consistency over 30 days
- Optional bloodwork: testosterone, hsCRP, fasting insulin
- Personalized protocol delivered to your inbox
Biological age predicts mortality better than your birthday
Research from the National Institute on Aging and Stanford's longevity labs consistently shows that biological age predicts all-cause mortality better than chronological age alone. A landmark study using the PhenoAge model demonstrated that people with a biological age 5 years older than their chronological age carried significantly elevated risk for cardiovascular disease, metabolic dysfunction, and cognitive decline — regardless of their actual age.
The mechanisms are well understood. Chronic sleep deficits suppress growth hormone and accelerate cellular senescence. Low VO2 max is one of the strongest independent predictors of early death — stronger than smoking status in several cohorts. Elevated chronic stress drives cortisol-mediated inflammation that degrades tissue integrity over time.
The critical insight: most biological aging accelerators are modifiable. Men who optimize sleep, training, nutrition, and recovery routinely reduce their biological age by 5 to 12 years within 18 months. But you cannot optimize what you have not measured. This calculator gives you a starting point.
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