PhenoAge explained: what it measures, how to interpret your score, and why it matters

You got your blood test results back. Everything is “normal.” But what if those numbers could tell you whether your body is aging faster or slower than expected? That is what PhenoAge does — developed by Morgan Levine at Yale in 2018, it transforms nine routine blood biomarkers into a single biological age score.

What you’ll learn:

• What PhenoAge measures and how the algorithm works
• How to interpret your score and “age acceleration”
• The 9 biomarkers and what each reveals

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What is PhenoAge?

Quick definition: PhenoAge converts nine blood test values plus chronological age into a “phenotypic age” — how your body is aging based on metabolic, immune, and organ function markers.

PhenoAge predicts all-cause mortality better than chronological age and responds to lifestyle changes within months. For the calculation method: PhenoAge and KDM from blood tests.

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The 9 biomarkers

#	Biomarker	Optimal Range	Reflects
1	Albumin	4.0–5.0 g/dL	Liver, nutrition
2	Creatinine	0.7–1.2 mg/dL (men)	Kidney function
3	Glucose	70–90 mg/dL (fasting)	Metabolic health
4	C-reactive protein	< 1.0 mg/L	Inflammation
5	Lymphocyte %	20–40%	Immune aging
6	Mean corpuscular volume	80–95 fL	RBC quality
7	Red cell distribution width	11.5–14.5%	Oxidative stress
8	Alkaline phosphatase	40–100 U/L	Liver/bone
9	White blood cell count	4.0–7.0 ×10³/μL	Immune activation

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Interpreting your score

Age acceleration = PhenoAge − Chronological age

Acceleration	Meaning	Action
< −5 years	Exceptional	Maintain lifestyle
−5 to −1	Good	Continue, fine-tune
−1 to +1	Average	Optimize
+1 to +5	Elevated	Review biomarkers
> +5	High	Physician consult

PhenoAge is a snapshot. Illness, sleep, exercise can shift values temporarily. Test every 6 months.

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PhenoAge vs epigenetic clocks

Feature	PhenoAge	Epigenetic Clocks
Sample	Standard blood panel	DNA methylation
Cost	$20–50	$200–500+
Turnaround	Same day	2–6 weeks
Sensitivity	Months	Years

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5 ways to improve PhenoAge

1. Reduce inflammation (CRP, WBC) — Omega-3, sleep 7–9h, eliminate ultra-processed food. CRP 3→1 mg/L shifts PhenoAge 1–2 years.
2. Optimize metabolism (glucose, albumin) — Time-restricted eating, protein 1.2–1.6 g/lb (2.6–3.5 g/kg), post-meal walks.
3. Support kidneys (creatinine) — Hydrate 30 mL/kg, monitor BP, reduce NSAIDs.
4. Build cardio fitness (RDW, lymphocytes) — 150–300 min/week moderate activity, zone 2 training.
5. Retest every 6 months — Same lab, fasting morning draw.

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How SuperAge helps

SuperAge accepts blood values, calculates PhenoAge, tracks longitudinally, and connects with Apple Watch data — HRV, activity, sleep.

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FAQ

Can I calculate from a standard blood test?

Yes. 8/9 biomarkers in CBC + CMP. CRP may need separate ordering as hs-CRP.

What if my score is much higher?

Retest first. Then identify the 1–2 markers driving elevation. Targeted interventions work within 3–6 months.

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Key takeaways

• PhenoAge converts 9 blood biomarkers into biological age
• Age acceleration tells if you’re aging faster/slower
• Responds to lifestyle changes within months
• Test every 6 months, same lab

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Download SuperAge to calculate PhenoAge and track it alongside Apple Watch data.

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References

1. Levine, M.E., et al. (2018). Epigenetic biomarker of aging. Aging, 10(4), 573–591.
2. Liu, Z., et al. (2019). New aging measure. PLOS Medicine, 16(2), e1002718.
3. Fitzgerald, K.N., et al. (2021). Reversal of epigenetic age. Aging, 13(7), 9419–9432.

Last updated: 2026-03-28.