Biological Age Tests for Men: How to Check and Improve Your Score

Two men walk into a doctor's office. Both are 52. One has the biomarker profile of a 44-year-old. The other shows the physiology of a 61-year-old. Their birth certificates say the same thing. Their bodies tell a different story.

Biological age testing makes that difference measurable. A 2018 Yale study published in Aging (Albany NY) showed that biological age predicted 10-year all-cause mortality better than chronological age alone, with each year of biological-chronological age gap corresponding to a roughly 9% change in mortality risk. Since then, testing options have multiplied, costs have dropped, and the science behind several methods has matured enough to be clinically useful.

This guide covers the two main test categories available to men today, what each one measures, how much they cost, and what the research says you can do to move your score in the right direction.

What Biological Age Actually Measures

Chronological age counts the years since birth. Biological age estimates how worn your body's systems are relative to a population average. The gap between the two reflects the accumulated effects of genetics, habits, stress, sleep, diet, and environment.

No single test measures "biological age" directly. Every method infers it by measuring something correlated with mortality or cellular deterioration, then translating that measurement into an age estimate. The quality of any test depends on how well its underlying markers predict health outcomes in large, well-studied populations.

The two most validated methods in 2026 are blood biomarker algorithms and epigenetic clocks.

Method 1: Blood Biomarker Tests

Blood biomarker tests calculate biological age from the same labs your doctor already orders: complete blood count (CBC), comprehensive metabolic panel (CMP), and a few additional markers. No special collection is required.

The PhenoAge Formula

The most validated blood-based method is PhenoAge, developed by Morgan Levine and colleagues at Yale. The algorithm was trained on NHANES III data, a nationally representative US sample of 9,926 adults with over 23 years of mortality follow-up. Levine identified nine markers that together predicted survival across cardiovascular, metabolic, immune, and organ function categories.

The nine markers are:

• Albumin
• Creatinine
• Glucose
• C-reactive protein (CRP)
• Lymphocyte percentage
• Mean corpuscular volume (MCV)
• Red blood cell distribution width (RDW)
• Alkaline phosphatase (ALP)
• White blood cell count

All nine appear on a standard CBC and metabolic panel. If you have recent bloodwork, you likely already have what you need. Our free PhenoAge calculator runs the published Vermeulen-Levine formula on your numbers and returns your biological age estimate in seconds.

What the Results Mean

A PhenoAge result below your chronological age indicates your biomarker profile matches the mortality risk of someone younger. Above your chronological age means the opposite. Research from the original Levine paper found that each year of biological-chronological age gap corresponded to a 9.5% difference in mortality probability over 10 years.

The result is probabilistic, not diagnostic. A 52-year-old with a PhenoAge of 58 doesn't have a guaranteed health crisis ahead. It signals that the metabolic patterns associated with faster aging are present and worth addressing.

Other Blood Biomarker Platforms

Platforms like InsideTracker and Function Health run broader blood panels, including hormones, nutrients, and inflammatory markers not captured by PhenoAge, then run them through proprietary algorithms to generate biological age scores. Costs range from $100 to $600 depending on panel depth. These platforms often include recommendation dashboards that flag out-of-range values and suggest interventions.

The limitation with proprietary platforms: their algorithms aren't peer-reviewed. PhenoAge is the only blood-based method with independent external validation across multiple populations.

Method 2: Epigenetic Clock Tests

Epigenetic clocks measure DNA methylation, the chemical tagging of specific positions on your DNA (called CpG sites) that controls whether genes are switched on or off. These methylation patterns change with age in predictable ways. Algorithms trained on methylation data from thousands of people can estimate how old your DNA looks compared to population norms.

A 2025 study published in Nature Aging found that a blood-based epigenetic clock built on intrinsic capacity predicted all-cause mortality independently of existing risk factors, with the strongest predictive value in adults under 60.

The Tests Worth Knowing About

GrimAge. Developed at UCLA, GrimAge is one of the most predictive epigenetic clocks for mortality and disease risk. It was trained on plasma protein data and methylation patterns and has been validated in multiple independent cohorts. A one-year increase in GrimAge acceleration is associated with a roughly 5% increase in mortality risk in some studies.

DunedinPACE. Where most clocks give you a static age estimate, DunedinPACE measures the pace of aging at the time of the test. It was derived from the Dunedin Study, a long-running New Zealand cohort tracked from birth to midlife. Rather than asking "how old does your DNA look," it asks "how fast is your DNA aging right now." This makes it more sensitive to recent lifestyle changes and potentially more useful for tracking interventions.

Horvath 2013 / Hannum Clock. These were the first generation of epigenetic clocks. They are accurate for age estimation but are less predictive of mortality than GrimAge or DunedinPACE. They remain scientifically important but aren't the tests to prioritize for actionable health insight.

How to Get Epigenetic Testing

Direct-to-consumer options include:

• TruDiagnostic (TruAge): A finger-prick blood sample mailed to their lab. Tests for GrimAge, DunedinPACE, PhenoAge, and several other clocks. Cost: $299 to $499 depending on panel.
• Tally Health: Cheek swab collection, uses a proprietary methylation clock co-developed with David Sinclair's lab at Harvard. Cost: $250 per test; subscription model available.
• Elysium Index: Cheek swab, proprietary clock based on first-generation Horvath methodology. Cost: $299.

For any epigenetic test you plan to repeat to track progress, order from the same company and use the same clock. Different algorithms produce different absolute numbers. Comparing a GrimAge result from TruDiagnostic with a Tally Health result is like comparing cholesterol values from two labs that use different assays.

Which Test Should You Start With

If you have bloodwork from the past three months and want a zero-cost starting point, run it through the PhenoAge calculator. The result gives you a validated mortality-correlated biological age estimate from data you already have.

If you want a deeper picture and are willing to spend $300 or more, TruDiagnostic's TruAge Complete panel provides GrimAge, DunedinPACE, and PhenoAge in a single test, giving you both a static age estimate and a pace-of-aging measurement. That combination tells you where you are and how fast you're moving in that direction.

For men tracking an intervention, DunedinPACE is the more responsive metric. A single lifestyle change may not shift your GrimAge meaningfully in six months, but DunedinPACE has shown sensitivity to dietary interventions within 8 to 12 weeks.

6 Ways to Lower Your Biological Age

The good news from the research: biological age responds to behavior. Unlike chronological age, it moves. Here's what the evidence supports.

1. Exercise Consistently, with Emphasis on Resistance Training

A Brigham Young University study found that adults who exercised vigorously for 150 minutes per week had biological ages roughly nine years younger than sedentary adults, measured by telomere length. A 2022 analysis published in Sports Medicine found that resistance training specifically reduced epigenetic age across multiple clock measures.

For men over 40, compound lifts (squats, deadlifts, rows, presses) done three to four times per week provide the strongest return on investment. Muscle mass loss accelerates after 40, and building or maintaining it reduces metabolic dysfunction, inflammation, and insulin resistance, all of which drive biological aging.

Zone 2 cardio three times per week adds cardiovascular and mitochondrial benefits that resistance training alone doesn't fully provide. The combination is more effective than either alone for reducing biological age markers.

2. Fix Your Sleep First

A meta-analysis of 67 studies with over 3.5 million participants found that both short and long sleep durations increased all-cause mortality risk. The optimal zone appears to be seven to nine hours per night.

Sleep debt directly raises biological age scores. A 2023 study in the Journal of Sleep Research found that chronic sleep restriction increased PhenoAge estimates significantly compared to controls, an effect that partially reversed after sleep recovery.

For practical strategies on improving sleep quality, see our guide on how to improve sleep quality for men over 40.

3. Reduce Chronic Inflammation Through Diet

CRP, one of the nine PhenoAge biomarkers, is a direct marker of systemic inflammation. Diet is the most controllable driver of CRP levels.

A 2023 meta-analysis of 21 randomized trials found that Mediterranean-pattern diets reduced hs-CRP by an average of 0.4 mg/L compared to control diets. Over time, participants following Mediterranean dietary patterns showed biological ages 1.5 to 2 years younger than chronological peers on several biomarker-based measures.

Practical targets: extra virgin olive oil as the primary cooking fat, 3 to 4 servings of fatty fish per week, leafy greens daily, and processed food removal before adding any supplements.

4. Address Stress Systematically

The National Institute on Aging published research in 2023 showing that acute psychological stress increased biological age markers in both humans and mice, and that the increase was largely reversible once the stressor resolved. Chronic unresolved stress, however, appears to accelerate biological aging through sustained elevation of cortisol and inflammatory cytokines.

Evidence-based stress management tools include mindfulness meditation (minimum 10 minutes daily in several trials), social support networks, and Zone 2 cardio, which reduces baseline cortisol levels with consistent training.

5. Consider Targeted Supplementation

A 2023 trial published in The American Journal of Clinical Nutrition found that participants taking a daily multivitamin had slowed epigenetic aging on two of five clocks compared to placebo, translating to 2.7 to 5.1 months of slowing over two years. The effect was larger in adults with dietary deficiencies.

Separate trials have shown that vitamin D3 supplementation at 4,000 IU per day for 16 weeks decreased biological age estimates by approximately 1.85 years on a first-generation epigenetic clock. Given that deficiency is near-universal in men over 40 in northern climates, this is a straightforward correction.

Creatine monohydrate (3 to 5 grams per day) has accumulated evidence for muscle preservation and emerging data on cognitive protection. Magnesium glycinate addresses a near-universal dietary gap and supports sleep quality and testosterone production, two factors closely tied to metabolic age.

6. Monitor Testosterone

Low testosterone accelerates several biological aging mechanisms: muscle loss, fat gain, insulin resistance, and bone density reduction. All four show up in PhenoAge-relevant biomarkers.

A 2024 study in Annals of Internal Medicine found that men with total testosterone below 213 ng/dL had significantly elevated all-cause mortality risk compared to men in the 300 to 600 ng/dL range. Men below 153 ng/dL showed elevated cardiovascular mortality risk specifically.

If your biological age score is higher than expected and you haven't recently checked your testosterone, that test belongs on your list. See our guide on signs of low testosterone in men over 40 for the clinical picture, and how to get your testosterone levels checked for the practical steps.

How Often to Retest

For epigenetic tests: once every six to twelve months is the standard tracking interval. Testing monthly won't capture meaningful signal through the biological noise.

For PhenoAge via bloodwork: whenever you have bloodwork done for other purposes, run the calculator. Many men over 40 get annual labs. That's an adequate frequency for tracking trends.

Document your inputs and results each time. The trend over two to three tests matters more than any single result.

Key Takeaways

• Biological age tests estimate how worn your body's systems are, independent of your birth year
• PhenoAge (nine blood biomarkers) is the most validated free method, available through our PhenoAge calculator
• Epigenetic clocks (TruDiagnostic, Tally Health) measure DNA methylation and cost $250 to $500
• DunedinPACE tracks pace of aging and responds faster to lifestyle changes than static age clocks
• Exercise, sleep, diet quality, stress management, and testosterone optimization each have randomized trial evidence for reducing biological age scores
• Retest every 6 to 12 months and track the trend

Frequently Asked Questions

What is the most accurate biological age test for men? No single test is universally "most accurate" because each measures different underlying processes. PhenoAge is the most validated blood biomarker method. GrimAge and DunedinPACE are the most predictive epigenetic clocks for mortality. For a comprehensive picture, a platform like TruDiagnostic that reports multiple clocks in one test provides the most actionable data.

Can I check my biological age for free? Yes. If you have recent bloodwork that includes CBC and a comprehensive metabolic panel, you can calculate your PhenoAge at no cost. Use the free PhenoAge calculator and enter your nine biomarker values.

How much do epigenetic age tests cost? Consumer epigenetic tests range from $249 (TruDiagnostic basic panel) to $499 (comprehensive multi-clock panels). Most require a blood spot collection kit mailed to a lab.

How fast can you lower your biological age? Controlled trials show meaningful changes in 8 to 12 weeks for DunedinPACE with dietary interventions. PhenoAge biomarkers like CRP can shift within weeks of reducing ultra-processed food intake or starting regular exercise. Static epigenetic clocks like GrimAge change more slowly, typically showing significant movement over six to twelve months of sustained intervention.

Does biological age testing tell me if I have a specific disease? No. Biological age tests are mortality risk estimation tools, not diagnostic tests. A higher biological age than chronological age suggests elevated health risk but does not diagnose any specific condition. Any concerning results should prompt a conversation with your doctor.

What's the difference between biological age and metabolic age? "Metabolic age" is a marketing term used by smart scales and fitness apps. It's typically calculated from body composition estimates and lacks the peer-reviewed validation of PhenoAge or epigenetic clocks. The term is not standardized across platforms. Stick to PhenoAge or epigenetic testing for results backed by mortality outcome data.

Can stress really age you faster? Yes, measurably. Research from the National Institute on Aging found that acute stress increased biological age markers in both humans and mice. Chronic sustained stress, through elevated cortisol and inflammatory pathways, accelerates several biological aging mechanisms. The encouraging finding from the same research: the biological age increase from acute stress was largely reversible once the stress resolved.

This article is for educational purposes only. Biological age tests are risk estimation tools, not diagnostic tests. Consult your healthcare provider before making changes to your diet, exercise routine, or supplementation based on biological age test results.