What does it measure?
Clinical PhenoAge combines your chronological age with nine blood measurements, including glucose, albumin, creatinine, CRP, alkaline phosphatase, and four blood-count measures. It expresses the mortality-risk pattern seen in its research population as an age-like number. It is different from DNAm PhenoAge, which uses DNA methylation. [1] [2]
Before reading the calculation
- Inputs
- Chronological age plus albumin, creatinine, glucose, CRP, lymphocyte percentage, MCV, RDW, alkaline phosphatase and WBC count.
- Method
- Use the published clinical PhenoAge equation and its required units. Lymphocyte percentage is an input here, not the absolute count.
What can the result mean?
A score above your calendar age reflects a pattern associated with higher risk in the model; a lower score reflects the opposite. It is not the literal age of your organs, a prediction of your personal lifespan, or proof that you have reversed aging. Population associations do not establish individual certainty. [1] [2]
Chronological age plus albumin, creatinine, glucose, CRP, lymphocyte percentage, MCV, RDW, alkaline phosphatase and WBC count.
- Method
- Use the published clinical PhenoAge equation and its required units. Lymphocyte percentage is an input here, not the absolute count.
When is it useful, and how is it read?
If the estimate changes, examine the individual inputs before interpreting the age label. An inflammatory episode or a change in kidney or glucose results deserves its usual clinical assessment. Lowering the score alone has not established that a treatment slows aging. [1]
What can affect it?
Acute illness, changes in a single input, incorrect units, or missing measurements can change the score. Use the intended model and consistent, appropriate laboratory data. Evidence from the populations studied does not guarantee identical accuracy in every country or clinical situation. [1]
Myth: «This number is your body’s exact age»
Clinical PhenoAge translates a pattern of routine results and calendar age into a population-based mortality-risk estimate expressed in years. It is not a direct clock for your organs, and it is different from a DNA-methylation age test. [1] [2]
Questions you might have
Is this the same as a DNA methylation age test?
No. Clinical PhenoAge uses blood chemistry and cell counts. DNAm PhenoAge is a different model based on DNA methylation. [1] [2]
Does a lower score prove that aging has reversed?
No. The model describes a mortality-risk pattern in studied populations. A change in the estimate alone does not establish a treatment’s effect on aging. [1]
What comes next?
Look at which underlying results explain the score and whether those results deserve care in their own right. Address established health priorities with your clinician. A changed score alone does not prove that an intervention extends life, and it should not become a treatment target. [1]
Which individual results explain my score, and would addressing them change my clinical care?
The reference interval and units on your report are part of understanding your result. Understand units, reference intervals, and treatment targets.
Sources & references
Medical references & original research
- Liu et al. — Phenotypic Age and morbidity/mortality risk in NHANES IV (original cohort study, 2018)
- Levine et al. — An epigenetic biomarker of aging for lifespan and healthspan (original study, 2018)
Further reading
Practical-section sources accessed: .
For general health education. Interpreting your result and deciding on tests or treatment requires your health context and a qualified clinician.
