Description
What is the Clock Foundation Epigenetic Age Test?
The Clock Foundation Epigenetic Age Test, also known as the GrimAge Test, provides an estimate of biological age using DNA methylation analysis from a blood sample.
DNA methylation is a chemical modification of DNA that can change with age, health, lifestyle and environmental exposures. Epigenetic clocks use patterns of DNA methylation to estimate biological ageing.
The GrimAge approach was developed from work by Professor Steve Horvath and colleagues. It is one of the best-known epigenetic ageing clocks and was designed to provide information about biological ageing and ageing-related health markers.
Click here to learn more about biological age.
What does biological age mean?
Your chronological age is your age in years from your date of birth. Your biological age is an estimate of how your body appears to be ageing based on measurable biological markers.
Two people may have the same chronological age but different biological age estimates. This may reflect differences in genetics, health, inflammation, metabolism, smoking, alcohol intake, exercise, sleep, diet, weight, stress and other factors.
A biological age test does not tell you exactly how long you will live. It provides a personalised marker that may help you understand whether your body appears biologically younger, similar to, or older than your chronological age.
What does the GrimAge Test measure?
The GrimAge Test uses DNA methylation markers to estimate epigenetic biological age. These markers are analysed mathematically to provide information about biological ageing and ageing-related risk patterns.
GrimAge has been studied as a predictor of ageing-related outcomes, including healthspan and mortality-related risk markers. However, the result should be interpreted as a biological ageing marker, not as a diagnosis or a prediction of an individual person’s future health.
The result may be lower than, similar to, or higher than your chronological age. It should be reviewed in the context of your wider health picture.
What is DNA methylation?
DNA methylation is an epigenetic process where small chemical groups, called methyl groups, are added to DNA. These changes do not alter the DNA sequence itself, but they can influence how genes are regulated.
Patterns of DNA methylation change across the lifespan. Epigenetic clocks use these patterns to estimate biological ageing.
An epigenetic clock test is a type of biochemical test that estimates age using epigenetic markers, often based on DNA methylation.
Who is this test for?
This test may be suitable for adults who are interested in:
- understanding their epigenetic biological age
- reviewing ageing and longevity-related markers
- assessing ageing rate as part of a wider health review
- monitoring health and lifestyle changes over time
- taking a more personalised approach to preventative health
It may be of particular interest to people who want a more detailed biological ageing assessment than a standard blood-biomarker calculation.
This test is not intended to replace medical assessment, screening, blood tests or investigation of symptoms.
How the test works
The test is arranged through Innermost Healthcare. A blood sample is collected and sent to the laboratory for DNA methylation analysis.
The laboratory analyses epigenetic markers and calculates an estimate of biological age. Once the result is available, it can be reviewed in clinical context, taking into account your chronological age, symptoms, medical history, family history, lifestyle and any other relevant health information.
We can discuss what the result means, what it does not mean, and whether any further health checks or lifestyle review may be appropriate.
Results and follow-up
Your report will provide an estimate of epigenetic biological age. This may be useful as a baseline measurement, especially if you are planning health or lifestyle changes and may want to monitor change over time.
If your result suggests accelerated biological ageing, this does not mean that you have a specific medical condition. It may, however, be a useful prompt to review modifiable health factors and consider whether any further clinical assessment or blood testing is appropriate.
If your biological age appears lower than your chronological age, this should still be interpreted carefully. It is reassuring as a marker, but it does not exclude future health risks or replace recommended screening and medical care.
Important limitations
The Clock Foundation Epigenetic Age Test is a biological ageing test. It is not a diagnostic test for cancer, cardiovascular disease, dementia, fertility problems, hormone disorders or any other specific medical condition.
The test does not predict exactly how long you will live. It provides an estimate of biological ageing based on epigenetic markers.
The result should not be interpreted in isolation. If you have symptoms, a known medical condition, a strong family history, or specific concerns about your health, you should arrange an appropriate medical consultation rather than relying on biological age testing alone.
Frequently asked questions
Is biological age the same as my actual age?
No. Your actual, or chronological, age is based on your date of birth. Biological age is an estimate of how your body appears to be ageing based on biological markers.
What is GrimAge?
GrimAge is an epigenetic ageing measure based on DNA methylation markers. It was developed to estimate biological ageing and ageing-related health risk patterns.
Is GrimAge the same as PhenoAge?
No. GrimAge and PhenoAge are different biological age tests.
GrimAge is an epigenetic test based on DNA methylation markers. PhenoAge is based on clinical blood biomarkers, including markers related to inflammation, metabolism, kidney function, liver and bone activity, red blood cell indices and immune profile.
If you are looking for a blood-biomarker biological age estimate, you may also want to consider the Clock Foundation PhenoAge Test.
What is the difference between epigenetic age and biological age?
Biological age is a broad term describing how the body appears to be ageing based on measurable markers. Epigenetic age is one way of estimating biological age, using DNA methylation patterns.
Does this test diagnose disease?
No. This test does not diagnose a specific disease. It should be viewed as a biological ageing and longevity-related marker rather than a diagnostic medical test.
Can this test predict how long I will live?
No. The test does not predict lifespan for an individual person. It provides an estimate of epigenetic biological age, which may be useful as part of a wider health and longevity assessment.
Can epigenetic biological age be improved?
Potentially, yes. Biological ageing may be influenced by smoking, alcohol, sleep, exercise, diet, weight, inflammation, stress and underlying health conditions. The result may help guide a broader health review.
Should I repeat the test?
Some people repeat epigenetic age testing after lifestyle or health interventions, but this should be considered on an individual basis. A repeat test may be useful if you want to monitor change over time.
Do I still need routine health screening?
Yes. Biological age testing does not replace routine health screening, medical reviews, blood tests or investigation of symptoms. It should be used alongside appropriate medical care.
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