How to extend healthspan

Written by Steve Fayzulayev. Clinically reviewed by Naomi Fayzulayev, FNP-C, MSN.

Last reviewed 2026-11-09. See our editorial policy and methodology.

Healthspan describes the years spent in good health and function. No single score or habit guarantees it, but a manageable plan can support your health goals.

Choose movement that fits

Physical activity supports health and function. Walking, swimming or another accessible activity can be a starting point, and muscle-strengthening activity can be part of a balanced routine.

Start at a level appropriate for you. If you have symptoms, medical conditions or concerns about exercise, ask your clinician about a safe approach.

Consider food and metabolic health

Food, activity, sleep, medications and medical conditions can all matter for metabolic health. A dietitian or clinician can help you choose changes that fit your needs.

If your assessment highlights a glucose-related result, review the actual test with your clinician. Fasting insulin alone does not diagnose insulin resistance or diabetes.

Make room for sleep and recovery

A regular opportunity for sleep and recovery can support well-being. Choose changes that work with your schedule rather than treating a wearable estimate as a diagnosis.

Discuss persistent sleep problems, snoring or daytime sleepiness with a clinician rather than relying on a score alone.

Keep clinical care in the picture

Discuss screening, symptoms and any concerning results with your clinician. The assessment does not replace routine care or determine which tests you need.

A repeat test may be helpful, but its timing should be based on the result and your circumstances, not a fixed schedule for everyone.

Avoid chasing a number

A lower calculator age is not proof of longer life or a substitute for how you feel and function. A single concerning result can still deserve prompt attention.

Do not replace prescribed care with supplements or stop medication based on a score. Discuss possible interactions and changes with your clinician.

A practical starting sequence

Review the measurements you already have, identify one question to discuss with your clinician, and choose one realistic habit to work on.

Agree on what to monitor and whether a follow-up is needed. The assessment can help organize information, but your goals and medical history guide the plan.

Score yourself free — no account needed →

Frequently asked questions

How to extend healthspan?

Healthspan describes the years spent in good health and function. No single score or habit guarantees it, but a manageable plan can support your health goals.

What does this guide cover?

This guide covers: Choose movement that fits; Consider food and metabolic health; Make room for sleep and recovery; Keep clinical care in the picture; Avoid chasing a number; A practical starting sequence.

All guides

Sources and further reading

Not medical advice. These are longevity-optimised reference ranges, which are deliberately stricter than standard clinical "normal" values. A value outside them does not mean you have a disease. Speak to a qualified healthcare professional before changing medication, supplements or training. Full disclaimer.
Ask Us

Choose a question. Answers come from this site, and nothing you open is sent anywhere.

How to extend healthspan?

Healthspan describes the years spent in good health and function. No single score or habit guarantees it, but a manageable plan can support your health goals.

What does this guide cover?

This guide covers: Choose movement that fits; Consider food and metabolic health; Make room for sleep and recovery; Keep clinical care in the picture; Avoid chasing a number; A practical starting sequence.

What is biological age?

Chronological age counts birthdays. Biological age estimates how old your body appears to be functioning, based on measurable biomarkers. Two people born the same year can differ by a decade or more in vascular stiffness, insulin signalling or cardiorespiratory fitness. Biological age makes that gap explicit — and unlike your birthday, it can move in either direction.

How is the Longevity Score calculated?

Each biomarker you enter is scored against longevity-optimised reference ranges and grouped into one of eight dials. Every dial produces its own biological age, and those are combined using fixed weights into a single composite, then expressed as a Longevity Score from 0 to 100. The weighting reflects how strongly each system predicts healthspan: structural and vascular carry the most, hormonal the least.

Do I need all 53 biomarkers?

No. The short form contains a subset of scoring inputs plus context-only fields, and you can leave any of them blank. It is not a recommendation to obtain tests. Missing values are excluded from the calculation — never treated as zero or as 'normal'. A dial with no scored data is dropped entirely and the remaining weights renormalise.

What can I measure without a blood test?

Some inputs can be measured without bloodwork. Blood pressure needs a home cuff and waist-to-height needs a tape measure. Wearable estimates vary; the floor-based sitting-rising test carries a fall risk and should only be attempted if safe.

Is this an anti-aging calculator? Is it a healthspan calculator?

Both terms describe what this tool does, and which one fits depends on what you are asking. "Anti-aging" is the term most people search, and loosely means anything aimed at slowing or reversing age-related decline — this tool fits that description if you score your dials and act on what you find. "Healthspan calculator" is the more precise term: healthspan is the number of years lived without serious chronic disease or disability, and that cannot be measured directly, so this tool scores eight systems that each function as an early-warning proxy for it. Either way, the method is the same: real biomarkers, published thresholds, no vanity-metric framing.

Why don't you have a quick quiz that skips biomarkers entirely?

Several popular tools ask only about habits — exercise days, sleep hours, smoking, diet quality — and return a single precise-looking age. We looked at the research behind that approach and chose not to build it. Published studies do show real, individually-measured links between specific habits and epigenetic age acceleration, but those effect sizes come from different study populations, different DNA-methylation clocks and different measurement units. Adding them together into one number is not something the underlying research actually supports — it produces a precise-looking result built on an imprecise method. Our dials use direct physiological measurements instead: a real blood pressure reading, a real VO₂ max, a real ApoB value. Several dials score from home-measurable data alone with no quiz-guessing involved — see what you can measure without a blood test, above.

Why are your 'optimal' ranges stricter than my lab's normal range?

Standard reference ranges describe what is common in a general population, which now includes a great deal of metabolic dysfunction. They are tuned to flag disease, not to identify what is optimal for a long healthspan. A fasting insulin of 20 µIU/mL sits inside most labs' normal range and is strongly associated with insulin resistance. This tool uses longevity-optimised thresholds instead, so a flag here means room for optimisation — not a diagnosis.

Why not just upload my labs to ChatGPT?

For understanding a single result, do — a frontier chat model is genuinely good at that, often clearer than most medical sites, and it handles markers no fixed tool covers. The limitation is different from the one most people assume. A language model produces a plausible response rather than a computed one, so the same panel can score differently on different days. That is fine when exploring an idea and disqualifying when measuring change, because you cannot tell how much of a difference is you and how much is the method. Use both: a chat model to understand, a fixed instrument to track.

All questions