A single score out of 100, built on peer-reviewed population-health research. In 4–5 minutes: your estimated health-age, where you stand relative to your age and sex group (WHO / GBD 2021 reference), and the system to act on first.
Blood pressure, glucose, cholesterol: the signals that precede disease by years. The heaviest system in the analysis — because that's where prevention wins the most.
It is the body's main repair window: memory, hormones, immunity. Under six regular hours, every other system pays.
What you eat repeats itself three times a day, for decades: fiber, quality of fats, ultra-processed foods. The overall pattern shapes your trajectory more than any single nutrient.
One of the most effective interventions we know of against aging — heart, muscle, brain. And most of the benefit begins with the first regular minutes.
Isolation carries a mortality risk comparable to smoking 15 cigarettes a day. The air you breathe, for its part, acts without you feeling it. This system measures what weighs in silence.
O estimates a health-age from your answers and the literature, with a stated precision. It makes visible what plays out on your trajectory and offers one action per day. It does not diagnose, and it does not replace your physician.
Where other tools track an isolated weight or lab result, O makes visible the five systems that weigh on your healthy years, and pinpoints the one whose improvement will count most.