How old is your body, really?
Eumaia turns a routine blood test into your biological age, shows which parts of you are driving it, and tells you on your next test whether what you changed actually worked.
Five minutes, no signup, no blood needed for the functional test. Built on the peer-reviewed PhenoAge model (Levine et al., 2018). Educational, not medical advice. How it works
Eumaia results
Illustrative sample
Biological age
44
Calendar age
42
Projected age if the plan works
Modelled from the changes in your plan. An estimate, not a promise.
41
Projected lifespan
Estimated from your biological age with US Social Security life tables (2023), the kind actuaries use.
76–82
| Albumin | 4.4 | g/dL |
| Creatinine | 0.92 | mg/dL |
| Fasting glucose | 97 | mg/dL |
| C-reactive protein | 3.1 | mg/L |
| Lymphocytes | 27 | % |
| Mean cell volume | 91 | fL |
| Red cell distribution width | 13.9 | % |
| Alkaline phosphatase | 81 | U/L |
| White blood cells | 6.4 | 10³/µL |
Measure it. Understand it. Improve it.
Measure. Enter results from any lab, or start with the five-minute functional test and no blood at all. Your biological age comes from nine standard blood markers and the PhenoAge model developed at Yale.
Understand. See which of six body systems are aging fastest and exactly which markers are moving your number. Nothing is hidden in a black box.
Improve. Try a change in the simulator before you make it, then retest and see whether it moved your biology, not just how you feel.
Track it honestly. Every retest is compared with the last, marker by marker, so you see exactly what moved your number. One test is a snapshot, since markers like CRP vary from draw to draw. The direction across three or more tests is the signal we stand behind.
Try the simulator
See what changes your biological age, before you change anything.
Drag the sliders on this sample profile and watch the adjusted age move. This is a simplified demo. Your real number uses the full PhenoAge model.
Adjusted age
46.8
0.8 years older
from a sample baseline of 46
Illustrative demo on a sample profile using simplified estimates. Not your personal result, and not medical advice. Your real score uses the full PhenoAge model on your own biomarkers.
Your longevity command centre
Biological Age
44
↑ 2 years older
Chronological
42
calendar age
Peer rank
58%
room to improve
System Ages
Sample dashboard — your data appears here after entering your biomarkers
What the research shows
The silent gap between your age
and your body's age
Two people the same age can be years apart biologically, and most never find out. In a 2021 randomized controlled trial (Fitzgerald et al., Aging, n=43, healthy men aged 50 to 72), eight weeks of diet and lifestyle changes lowered epigenetic age by 3.23 years relative to controls. The evidence base here is young, and we would rather show you the study size than hide it.
−3.23
years
Epigenetic age reduction versus controls after 8 weeks of diet and lifestyle change. Randomized controlled trial, n=43, healthy men aged 50–72 (Fitzgerald et al., Aging, 2021)
11,000+
participants
Sample the PhenoAge algorithm was developed and validated on, using NHANES III with mortality follow-up (Levine et al., Aging, 2018)
n=43
be skeptical
The reversal trial above is small, short, and measured a different clock than we use. We show you study sizes because the longevity field is full of numbers that do not survive contact with the source
Not a tracker. A model of you.
Apple Health and InsideTracker measure where you are today. Eumaia models how your biology responds to what you change, and keeps score across every retest.
A simulator for your own numbers
Ask what happens if you fix your sleep, lower your glucose or add zone 2 training, and see how your PhenoAge estimate would move if those markers shifted. A modelled scenario, not a promise.
Try the simulatorBiological age from nine markers
Calculated with the PhenoAge algorithm from albumin, creatinine, glucose, CRP and five more standard blood results.
Six system ages
Heart, lung, skin, brain and muscle ages alongside your overall number, so you know where to focus first.
Research, summarised for you
Recommendations drawn from the published work of Levine, Patrick, San Millán, Bikman and Huberman, mapped to your markers.
How you compare
See where your biological age sits against anonymised members your own age.
The longevity killers audit
Everyday exposures that can speed aging, from food and water to cookware and air, and what to swap.
Run the auditThe honest question
Why not just use Apple Health,
InsideTracker, or Function Health?
Those platforms
Provide diagnostics — they measure what you are today
Show results but don't model what changes them
Are optimised for hardware, lab kits, or wearables
Can't simulate "what happens if I fix my CRP in 90 days?"
Eumaia
Provides intelligence — it models and simulates your aging trajectory
Runs your biomarkers through a digital twin and shows what moves them
Tracks intervention response longitudinally — did the protocol actually work?
Gets smarter as you add data — labs, wearables, genetics, habits
The short answer: they provide diagnostics. We provide intelligence infrastructure. Use them together.
Research sources
Featured longevity experts
Eumaia surfaces research-informed protocols from leading longevity researchers — drawn from their publicly available work.
Valter Longo
Longevity director, USC
Iñigo San Millán
Exercise physiologist
Andrew Huberman
Stanford neuroscientist
Morgan Levine
Biological age scientist
Rhonda Patrick
Micronutrient researcher
Not affiliated with, endorsed by, or partnered with any expert listed. All content is drawn from publicly available published work.
Beta access
Join the Eumaia beta.
It's free.
Early access users shape the product. You'll get your biological age score, the full simulator, expert protocols, and direct input into what we build next.
Beta is capped at 100 places. After that, new signups join the waitlist.
No spam. No credit card. Unsubscribe anytime.
What beta includes
Biological age score
Full PhenoAge calculation from your blood panel — 9 validated biomarkers.
Digital twin simulator
Model how exercise, CRP and homocysteine changes affect your biological age.
6-system age breakdown
Biological, heart, lung, skin, brain, muscle — tracked separately.
Expert protocols
Research-informed plans drawn from the published work of Levine, Longo, San Millán, Huberman and Patrick.
Direct product input
Beta users vote on what we build next. Your feedback shapes the roadmap.
Already registered?
Sign in →
Find out where you stand today.
Five minutes, no signup and no blood for the functional test. Add your labs any time for your biological age.
60 seconds · no signup · educational estimate