Vitality Age
How your Vitality Age is calculated.
The whole formula, in plain terms. Nothing here is hidden from you.
This is a wellness index, not a measure of biological age.
Vitality Age is a wellness index Valdura calculates from your own data: an estimate of how your selected markers compare with research-based ranges, to make patterns easier to see and act on. Vitality Age is not a measure of biological age and is not intended to diagnose, predict, or assess any disease or medical condition. It is not a clinical assessment, and not a prediction of how long you will live. It is our own model, not a validated clinical test. Talk to a clinician about anything that concerns you, and never let a number here delay seeking care.
How the number is built
Five steps, no black box.
Start at your calendar age
Your Vitality Age begins as your actual age. Everything after this moves it up or down from there, so a result equal to your age means your markers are landing where we would expect.
Compare each marker to its optimal range
For every marker we have, we measure how far the value sits outside its optimal window. A value inside the window earns a small credit that grows the more room it has from the edge.
Scale that distance so markers are comparable
A distance in mg/dL and a distance in milliseconds are not the same size, so each gap is divided by that marker's own range. This is what lets cholesterol and heart-rate variability sit in the same total.
Weight by how much the marker matters
Markers carry different weights based on how strongly they track long-term health. ApoB and HbA1c weigh more than folate. The weights are our judgement, informed by the literature but not taken from a published formula.
Add it up, with limits
No single marker can move your age by more than 2 years, and the total is capped at 8 years in either direction. Past that point the number stops meaning more and just looks dramatic.
The rules we hold ourselves to
- We need at least 5 markers
- Below that we show no number at all, rather than a confident-looking one built on almost nothing.
- New devices warm up for 4 days
- A device you connected yesterday tells us very little, so its data does not count toward your number until it has several distinct days on record.
- Device data is averaged over 7 days
- One short night does not define you. Sleep, heart-rate variability, resting heart rate, and steps are scored on their recent average, so a sustained pattern moves the number and a single rough night barely does.
- Device data stops counting after 30 days without a new reading
- If a device has sent nothing new in that time, its older readings stop counting toward your number and your body map until it syncs again, so weeks-old data never speaks for how you are today.
- Heart-rate variability is compared with what is typical for your age
- Heart-rate variability falls with age in healthy people, so we compare yours with what is typical at your age rather than with one number for everyone. Your number already starts from your age, and judging it against a young adult's values would count your age twice.
- Your lab's own ranges win
- Where your results carry reference ranges from the lab that ran them, we use those rather than our defaults, because ranges legitimately differ between labs and assays.
- Markers we cannot scale are held back
- A few markers are reported in different units by different labs. When we cannot confidently size a result, we let it register as a small nudge instead of guessing at a large one.
What this number is not
Read this before you read the number.
- It is not a measure of biological age and is not intended to diagnose, predict, or assess any disease or medical condition.
- It is not a diagnosis, and it is not a clinical assessment of your health.
- It is not a prediction of your lifespan.
- It is not a validated clinical aging biomarker. It is Valdura's own model, built to be useful and legible rather than to match a published formula.
- It reflects only the markers we happen to have for you. Two people in the same health can get different numbers if one has had more testing.
- Device figures are your device's estimates, not clinical measurements.
- Bloodwork reflects the day it was drawn. An older panel still counts, so a number resting on old labs describes an older picture of you.
- It is not a substitute for talking to a clinician, and no result here should delay seeking care.
Every marker that can move it
Generated from the live scoring engine.
This list is generated from the live scoring engine, so it always matches what is actually running. You will only be scored on the markers we actually have for you.
Cardiovascular
| Marker | Which direction hurts | Weight |
|---|---|---|
| ApoB (heart-risk particles) | Higher is worse | Heavier |
| HDL (“good”) cholesterol | Lower is worse | Lighter |
| LDL (“bad”) cholesterol | Higher is worse | Standard |
| Lipoprotein(a) | Higher is worse | Standard |
| Total cholesterol | Higher is worse | Standard |
| Triglycerides | Higher is worse | Standard |
| VO₂ max (aerobic fitness) | Lower is worse | Heavier |
Hormonal
| Marker | Which direction hurts | Weight |
|---|---|---|
| Testosterone (free) | Lower is worse | Heavier |
| Testosterone (total) | Lower is worse | Heavier |
Inflammation
| Marker | Which direction hurts | Weight |
|---|---|---|
| Homocysteine | Higher is worse | Standard |
| Inflammation (hs-CRP) | Higher is worse | Heavier |
Liver and kidney
| Marker | Which direction hurts | Weight |
|---|---|---|
| Kidney check (creatinine) | Either direction | Lighter |
| Liver enzyme (ALT) | Higher is worse | Lighter |
| Liver enzyme (AST) | Higher is worse | Lighter |
Metabolic
| Marker | Which direction hurts | Weight |
|---|---|---|
| 3-month blood sugar (HbA1c) | Higher is worse | Heavier |
| Fasting blood sugar | Higher is worse | Standard |
| Fasting insulin | Higher is worse | Heavier |
Nutrients
| Marker | Which direction hurts | Weight |
|---|---|---|
| Ferritin (stored iron) | Lower is worse | Standard |
| Folate | Lower is worse | Lighter |
| Vitamin B12 | Lower is worse | Lighter |
| Vitamin D | Lower is worse | Standard |
Sleep and recovery
| Marker | Which direction hurts | Weight |
|---|---|---|
| Daily steps | Lower is worse | Lighter |
| Heart rate variability (overnight) | Lower is worse | Standard |
| Readiness score (Oura) | Lower is worse | Lighter |
| Recovery score (Whoop) | Lower is worse | Lighter |
| Resting heart rate | Higher is worse | Standard |
| Sleep duration | Either direction | Standard |
Thyroid
| Marker | Which direction hurts | Weight |
|---|---|---|
| Thyroid hormone (Free T4) | Either direction | Lighter |
| Thyroid signal (TSH) | Higher is worse | Standard |
Think this number is wrong?
Tell your assistant, or report it in the app. We would rather hear that the number looks off than have you quietly distrust it. This calculation has been corrected before because a member said exactly that.