§ 01 · The science
Three questions every lab result should answer.
Standard blood tests answer one of them — badly. EVA was built to answer all three.
This page is our answer to all three.
§ 02 · What normal hides
'Normal' was built by averaging sick people.
Reference ranges are built from the average of the general population. That population includes people who are prediabetic, chronically inflamed, or metabolically unwell. 'Normal' is simply a statistical average of whoever walked into the lab, not a definition of health.
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Your value · hs-CRP
2.1mg/L
Status
Above optimalInside the standard clinical range, but above the level longevity research associates with the best long-term outcomes.
FIG. I
One biomarker, two readings. The example is hs-CRP (C-reactive protein, an inflammation marker).
Drag the marker — or scroll, or use the arrow keys — to watch the status change with the value.
The distance between 'normal' and 'optimal' is where most silent decline hides. The figure reads the same value two ways: once against standard clinical ranges, once against EVA's longevity ranges. The gap usually appears years before any symptom.
of adults with diabetes in Europe don't know they have it.
IDF Diabetes Atlas, 2024
Biological age compares you to everyone else your age.
Longevity score compares you to your optimal self.
The first is a mirror.
The second is a map.
§ 03 · Biological age
Age is a number. Aging is a rate. We measure the rate.
Your birthday tells you how long you have been alive. Your biomarkers tell you how long your body has been wearing down. They are not the same number.
Key
a. Your biological age
b. Years younger than your chronological age
c. Where you sit in your age cohort
Lab notes · I.II.III
Measure
A carefully chosen set of blood markers, each one shifting predictably as we age. Together they cover the systems that age fastest: inflammation, blood sugar, liver, kidney, and immune function.
Compare
Using the Klemera-Doubal method, each of your values is compared against thousands of others in your age group. Markers that track age most reliably carry the most weight. Noisier ones count for less.
Estimate
The method reads your whole biomarker pattern and finds the age it most closely resembles. That number is your biological age.
This tells you how you are aging compared to your peers. It does not tell you how close you are to your best possible self.
The Klemera-Doubal method was published in 2006 and remains the most rigorously tested way to estimate biological age. It predicts long-term health more reliably than simpler approaches in large population studies.
§ 04 · The longevity score
Two scores.One mirror.One map.
Knowing you are biologically younger than your peers is reassuring. Knowing exactly which change would move your health the most is something else entirely. That is what the longevity score is for.
Current reading
EVA Longevity Score · Mk III
Calibration · α β γ
Your optimal
For every biomarker, a target tailored to your sex and age group. Not a population average, but the value linked to the best long-term health outcomes in the research.
Ranked by evidence
Not every biomarker matters equally for longevity. Each is weighted by how strongly it is linked to long-term health. The markers backed by the most research move your score the most.
Score + map
The gaps between your values and your optimal targets become a single score from 0 to 100, plus a clear priority list. What moves your health most, first.
Calibration notes
- 24 age groups spanning 18 to 100+
- Separate optimal targets for males and females
- Reviewed quarterly against new peer-reviewed longevity research
§ 05 · The data layer
165+ biomarkers. 15 categories. 7 derived metrics.
This is what the algorithms read. Every result is checked against the range that is optimal for your age and sex, then folded into both your biological age and your longevity score.
The biomarker map
I — XVDerived metrics
1 — 7§ 06 · The signal
Your wearable fills the gaps between draws.
Blood panels run quarterly. Between them, your wearable provides a continuous signal. When your HRV drops the week after a draw, EVA connects it to your cortisol result. Context changes what the numbers mean.
§ 07 · The loop
Test. Interpret. Act. Repeat.
Health does not improve from a single snapshot. The quarterly loop is where the science compounds. Each panel builds on the last, each score tracks your trajectory, and EVA AI surfaces what changed, and why.
Postmarks — tap to explore
N° VIII
An invitation
Start your journey.
Upload existing labs for free, or subscribe for optimal ranges, biological age, and longevity score tracked every quarter.
With care and attention, EVA Health.