PhenoAge

Epigenetic

DNA Methylation Clocks

PhenoAge is an epigenetic-era biological age measure derived from routine clinical biomarkers, including albumin, creatinine, glucose, CRP, lymphocyte percentage, mean cell volume, red cell distribution width, alkaline phosphatase, and white blood cell count. It predicts morbidity and mortality better than chronological age alone. A longevity practice tracks it because it links biological age directly to modifiable clinical labs.

What It Measures

Epigenetic clock based on clinical biomarkers (albumin, creatinine, glucose, CRP, lymphocytes, MCV, RDW, ALP, WBC); predicts morbidity and mortality better than chronological age

Optimal vs. Lab Range

Longevity Optimal

Biological age < chronological age

Target range for optimal health and longevity based on research.

Standard Lab

N/A — compared to chronological age

Population-based reference range from standard labs.

Why It Matters

A PhenoAge above your chronological age points to accelerated aging, higher disease risk, inflammatory burden, and metabolic dysfunction, while a biological age below chronological age is the goal. What sets PhenoAge apart is that it is built from standard clinical biomarkers rather than protein surrogates like GrimAge or the pan-tissue methylation signal behind Horvath, so its inputs are transparent and directly actionable. This makes it a practical bridge between everyday lab work and biological aging. It pairs well with pace-of-aging clocks such as DunedinPACE for a fuller picture. PhenoAge remains an emerging tool rather than a diagnostic certainty.

When Low

N/A — younger is the goal

When High

Accelerated aging, disease risk, inflammatory burden, metabolic dysfunction

How to Optimize

Because PhenoAge is calculated from clinical biomarkers, the most direct path is to address the underlying labs that feed it: reducing inflammation reflected in CRP, optimizing glucose and metabolic health, and supporting kidney, liver, and immune markers through diet, exercise, sleep, and stress management. Improving these component biomarkers can lower the calculated PhenoAge. Investigational agents such as rapamycin and senolytics remain experimental and physician-directed. Biological-age testing is an emerging tool; interpretation and any interventions should be individualized with your physician; this content is educational and not a substitute for medical advice.

Key Interventions & Linked Compounds

Strong evidence

Key Interventions

Address underlying clinical biomarkers that feed PhenoAge calculation

Linked Compounds & Supplements

Same as GrimAge protocol

Curated from clinical literature. Individual results vary; consult a qualified clinician before changing a protocol.

Ordering Notes

Specimen

Buccal swab or whole blood (EDTA)

Patient prep

No fasting required. Maintain usual diet and medications unless advised.

Recommended cadence

Annual

Reporting unit

Confirm with the performing lab — units vary by region.

Pre-analytic notes

Standardize draw time of day, hydration, and recent exercise. Note any acute illness, supplements, or hormonal therapies on the requisition.

Recommended Follow-Up Actions

1
Confirm the result is reliable
Repeat abnormal values before acting — preferably from the same lab, same time of day, and under consistent prep. Rule out acute illness, recent intense exercise, or medication effects that can shift PhenoAge.
2
Compare against optimal, not just lab range
Use the optimal window above as the target. Lab "normal" is built from the general population and often misses early dysfunction.
3
Pair with related markers
Order a complementary panel covering metabolic, inflammatory, and hormonal context to interpret this marker properly.
4
Discuss interventions with a clinician
Use the interpretation guidance above to frame the conversation. Bring trends, not just one datapoint, to your visit.
5
Re-test on a defined cadence
If a change is implemented, re-measure in 8–12 weeks for fast-moving markers, or 3–6 months for slower ones, to confirm response before escalating.