01 · Two timelines
The calendar advances. Biology responds.
Chronological age counts time since birth. Biological age attempts to estimate patterns observed across biomarkers.
Educational estimate; not a diagnosis.
Biological age panel
Your birth date is one data point. It is not the whole context.
We bring selected biomarkers together and interpret them alongside your history, risk, and clinical goals.
Biological age is a statistical estimate based on biomarkers, not a diagnosis.
Book your panelTwo timelines
One is fixed. The other requires interpretation.
Chronological age
Tracks the time since your date of birth.
Estimated biological age
Combines biomarkers in a statistical model with limitations.
Conceptual visual without patient data or a numeric age-reversal claim. The estimate alone does not determine your health status.
Ranges and risk
Normal is a range. Your health needs context.
A result within the reference range does not mean zero risk; it also does not turn a healthy person into a patient.
Reference ranges show what is expected in a population. At Fenix, we also review trends, history, and cardiovascular or metabolic risk when relevant, without inventing “optimal” ranges to sell a solution.
Educational Visual Story · 50 seconds
Biological age: how we read the body's signals
An educational progression through the biomarkers, vascular pathways, and organ systems evaluated in longevity medicine.
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Select chapter · 01 / 0510s
Two times
Chronological vs. biological time
Chronological age counts years; biological age is a statistical estimate that combines biomarkers in a model. It guides rather than diagnoses: a lower estimate does not mean fewer years or that you have grown younger.
Key biomarkers & observations
- Chronological time vs. phenotypic age models
- Blood biomarkers combined in a model
- Your medical history as the starting point
Biological age is an integrated estimation model, not an absolute diagnosis or personal timeline. Clinical interpretation always requires individual physician review.
Systems reading01 / 05
What it may include
Markers with a defined role
The final panel depends on clinical judgment. These groups are part of the baseline design; they do not all need to be repeated at the same frequency.
Glucose, insulin, and HbA1c
HbA1c summarizes about three months, so we use it to track change at 90 days.
Lipids and ApoB
ApoB counts cholesterol-carrying particles, read alongside your cardiovascular risk.
CBC and metabolic panel
They provide clinical variables used by published models and by the broader assessment.
Baseline Lp(a)
Most adults need this measured once because it is primarily genetic and stable; it is not part of routine 90-day retesting.
The process
Measure, discuss, decide
Preparation and draw
The appointment is scheduled in the morning with an 8–12 hour fast when directed by the team. The draw generally takes about 15 minutes.
Results in person
We review results in person, about 20 minutes: no interpretations by message, no unexplained asterisks.
Selected review
At 90 days, only markers that can respond in that window—such as HbA1c, glucose and insulin, lipids, and ApoB—are repeated when indicated.
What this panel does not promise
It does not diagnose on its own, prove that an intervention changed your age, or replace a medical evaluation. We do not publish age-reversal figures or repeat stable tests such as Lp(a) without an indication.
First step
Put your results in context.
Book the panel and our team will confirm preparation, eligibility, and next steps without asking for clinical information in this form.
Book your panel