Your Aging Is Modifiable

Your Biological Age Can Change. Find Out Where You Stand.

GrimAge — cited in 800+ peer-reviewed publications — is the gold standard for measuring biological age. And unlike your DNA sequence, your epigenetics respond to how you live. Our platform helps you understand what to do next.

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Free Tools to Help You Get Started
At-Home Testing
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GrimAge Systems Aging

800+ peer-reviewed citations

-6 yrs
Bio 42 · Chrono 48
Vascular
+0.2y
Cellular
+0.1y
ECM
0.0y
Lung
-0.2y
Kidney
-0.3y
Muscle
-0.5y
Immune
-1.0y
Brain
-4.3y

Lu et al. 2019 · Aging · doi:10.18632/aging.101684

Already Have Results?
Bring Your Existing Data

Tested with another provider? Upload your prior epigenetic results or blood panel data and start tracking from day one.

Drop PDF or lab reports

GrimAge, PhenoAge, blood panels

my_grimage_results.pdf

GrimAge report imported

quest_blood_panel.pdf

PhenoAge calculated from labs

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Research Hub
Discover Treatments & Compare the Evidence

Biological age reduction by intervention

GLP-1 RA
-2.2 yrs
Exercise
-1.8 yrs
Metformin
-1.3 yrs
Caloric Restr.
-0.9 yrs
RCT 🧑

Semaglutide reduces PhenoAge acceleration

Wainberg et al. 2025 · JAMA Netw Open

RCT 🧑

Caloric restriction slows DunedinPACE

Waziry et al. 2023 · Nature Aging

Pre 🐭

Metformin extends lifespan 5.8%

Martin-Montalvo et al. 2013 · Nature Comms

Why Test Your Biological Age?

Because unlike your genes, your epigenetics can change — and that makes them actionable

Your Epigenetics Respond to Action

Diet, exercise, sleep, supplements — they all leave measurable marks on your DNA methylation. Epigenetic testing captures what's actually changing at the molecular level.

Understand What to Do Next

A number alone isn't enough. Our platform connects your results to curated evidence on treatments, biomarkers, and lifestyle interventions — so you know what's worth trying.

See If It's Working

Repeat testing shows whether your changes are making a real difference. Track your biological age over time and adjust your approach based on data, not guesswork.

Simple At-Home Testing

Get your results in 3 easy steps

1

Order Your Kit

Choose from our selection of epigenetic tests. Your kit arrives with everything you need for an easy at-home sample collection.

2

Collect & Ship

Follow the simple instructions to collect your sample. Use the prepaid shipping label to send it back for analysis.

3

Get Your Results

Receive your detailed biological age report online within 2-3 weeks. Track changes over time with repeat testing.

Backed by World-Class Aging Science

Testing from the Clock Foundation is used widely by leading research institutions worldwide.

Research partners including Harvard, UCLA, Stanford, Yale, Duke, and many more

Choose Your Test

Science-backed epigenetic aging clocks

Most Popular

GrimAge Test Kit

$325 / test

The gold standard in mortality risk prediction. Based on DNA methylation patterns linked to smoking, inflammation, and key plasma proteins.

  • GrimAge biological clock
  • Mortality risk assessment
  • At-home blood collection
  • Online results portal
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PhenoAge Test Kit

$95 / test

Blood-based biological age using standard lab markers. A clinically validated clock measuring your physiological age.

  • PhenoAge biological clock
  • 9 clinical biomarkers
  • At-home blood collection
  • Online results portal
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Best Value

3-for-1 Bundle

$150 / month

Our most comprehensive plan: GrimAge + PhenoAge tests combined with wearables monitoring for complete aging insights.

  • GrimAge epigenetic clock
  • PhenoAge biological clock
  • Wearables integration
  • Monthly tracking dashboard
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Recent Media Coverage & Interviews

Our research featured in leading publications worldwide

National Geographic: Can aging be cured? Scientists are giving it a try
The Guardian: Why startups are racing to measure your biological age
Financial Times: The race to reverse ageing
Bloomberg: Anti-Aging Science Could Extend Human Life Expectancy
Quanta Magazine: Epigenetic 'Clocks' Predict Animals' True Biological Age

From Measurement to Action

Every tool answers the same question: what does the science say, and what should I do about it?

Protocol Analyzer

Upload your supplement protocol and get an evidence report on each ingredient's longevity research.

Claims Validator

Paste a URL from any health product page and we'll fact-check the claims against published research.

Blood Test Analysis

Upload your lab results and get personalized interpretations focused on longevity-relevant biomarkers.

Upload Results

Personal Studies

Design and track your own N-of-1 experiments to measure the impact of interventions on your health.

Learn More

Longevity Lingo

Learn the language of longevity science with our fun, plain-English glossary of key terms and concepts.

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Research Hub

Browse curated evidence on longevity treatments, biomarkers, and outcomes from peer-reviewed research.

Explore Research

Frequently Asked Questions

Have more questions? Contact our support team anytime.

Contact Support
What is biological age?
Biological age reflects how old your body actually is at a cellular level, based on biomarkers like DNA methylation patterns. Unlike chronological age (years since birth), biological age can be influenced by lifestyle, environment, and genetics. Two people of the same chronological age can have very different biological ages.
How is the test performed?
Our at-home collection kit uses a simple finger-prick blood sample. The kit includes everything you need with easy-to-follow instructions. Once collected, you ship it back using the included prepaid label for DNA methylation analysis.
How long until I get results?
Results are typically available within 3-4 weeks after your sample arrives at our lab. You'll receive an email notification when your results are ready to view in your secure online portal. Priority processing is available with our Complete Panel package.
Can I reduce my biological age?
Yes — and that's what makes epigenetic testing fundamentally different from genetic testing. Your DNA sequence is fixed, but your epigenetic patterns respond to how you live. Published research shows that changes in diet, exercise, sleep, stress management, and targeted interventions can measurably reduce biological age. Our platform helps you identify which changes have the strongest evidence and track whether they're working for you.
Can I use my existing epigenetic test data?
Yes! If you've already had a methylation array test from TruDiagnostic, Elysium, or another provider that uses Illumina arrays, you can upload your raw IDAT files for a free GrimAge compatibility evaluation. No new test needed — just request your data files from your provider and upload them here.

Your Aging Story Isn't Written Yet

Measure where you are, understand what the science says, and take evidence-backed action. That's what we're here for.

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