Answered questions
Aging clocks
80 answered questions · 561 studies
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Can nucleotides lower your biological age?
NAD+ supplements measurably raise NAD+ levels in your blood and, in one study, prevented biological age from rising, but did…
Preliminary evidence
How does your immune system age and can a blood test measure that?
Your immune system ages in recognisable ways: exhausted immune cells and smouldering inflammation are clearly visible…
Preliminary evidence
What do biological ageing clocks actually measure?
Biological ageing clocks measure methylation patterns on your DNA and show that loss of cell identity resets the counter to…
How reliable is a protein test for measuring your biological age?
A protein test is a promising and now reasonably well-supported way to measure biological ageing, particularly as a predictor…
What does your vascular age tell you about your health?
A high vascular age on the measurement is a serious signal: your risk of cardiovascular disease, dementia, and premature death…
Is a clinic package for biological age worth the extra cost?
A clinic package can capture more than a single test, but only if it combines the right, newer markers. As long as reference…
Moderate evidence
Which DNA clock is best: GrimAge, DunedinPACE or PhenoAge?
GrimAge2 has the strongest evidence base for predicting mortality and healthy life years. If you want to know which clock…
Moderate evidence
Does a biological age test give the same result twice?
The same test yields reasonably consistent results when repeated, but different tests do not measure the same thing and are…
How often does it make sense to remeasure your biological age?
Clocks change slowly: two years is a realistic minimum to see the effect of a lifestyle change, but whether a lower score…
Moderate evidence
What do you do with the result of a biological age test?
A biological age higher than your calendar age is a signal, not a diagnosis. Use the result as a reason to examine your…
Preliminary evidence
Does the PhenoAge test measure your biological age with standard blood values?
Standard blood test results can provide an estimate of your biological age through PhenoAge, and that estimate predicts health…
How reliable is a GlycanAge test for measuring your biological age?
GlycanAge measures something real, but whether the score reliably reflects your biological age has not yet been independently…
Can semaglutide slow down the ageing process?
There are early encouraging signs that semaglutide may be able to slow biological ageing, but the clinical evidence comes from…
Preliminary evidence
Does alpha-ketoglutarate work against ageing?
In animal research AKG clearly extends lifespan, but solid evidence in humans is still lacking. Wait for the results of the…
Preliminary evidence
What can you expect from a longevity clinic in the Netherlands?
A longevity clinic can offer you interesting measurements of your health markers and a good exercise programme. For most…
Preliminary evidence
Does your telomere length tell you anything useful about your health?
Telomere length is a relevant biological measure, but does not give a clear-cut signal: shorter telomeres increase the risk of…
Do epigenetic clocks vary so much that your result is just chance?
Epigenetic clocks can diverge substantially for the same purpose, so your result does genuinely depend on which clock is used.…
Can epigenetic reprogramming reverse ageing?
Epigenetic reprogramming consistently and convincingly rejuvenates cells and tissues in animal and laboratory studies, but no…
Preliminary evidence
What does your klotho level tell you about how fast you are ageing?
A low klotho level is associated with a higher risk of death in older age, but as a personal measure of ageing speed the test…
What do we know about rapamycin as an anti-ageing agent in humans?
Rapamycin shows measurable improvements in immune function and cellular ageing markers in people. Whether it also extends…
Does plasma exchange (plasmapheresis) work against ageing?
There are initial, cautiously positive indications from one small study, but it is too small and too influenced by commercial…
Preliminary evidence
Does calcium-AKG lower your biological age?
Reliable evidence that calcium AKG lowers biological age in humans is lacking. The well-known claim of 8 years comes from a…
Preliminary evidence
Why does the risk of cancer increase with age?
Cancer becomes more common with age because DNA damage accumulates, the immune system declines, and damaged dormant cells can…
Can you lengthen your telomeres through lifestyle?
Lifestyle can probably slow telomere shortening, but the starting length of your telomeres is largely genetically determined…
Yes · Moderate evidence
Does your body age faster after a prolonged period of stress?
Prolonged stress is associated with signs of faster cellular ageing, but whether this is truly causal and applies to everyone…
Does your body odour change as you get older?
Yes, your body odour changes noticeably with age: from your forties onwards your skin produces a compound that adds a greasy,…
How reliable are the biological age tests you can buy online?
Biological age tests are scientifically grounded when applied to large groups, but what a score means for you personally has…
Does your resting heart rate say anything about how fast you are ageing?
A structurally high resting heart rate, certainly above 80 to 90 beats per minute, is associated with a clearly higher risk of…
How reliable is an epigenetic age test?
An epigenetic age test provides a meaningful indication of biological ageing, but is not yet a definitive verdict on your…
Moderate evidence
Does the country you live in affect your biological age?
The country you live in probably influences biological ageing markers through diet and living conditions, but direct…
Can you see how fast you are ageing from your stool?
Your microbiome does change with age and is associated with health risks, but a reliable ageing test based on stool does not…
Moderate evidence
Do your kidneys age at a different rate than your liver?
The kidneys age measurably faster than the liver, but for most healthy people that decline only has major consequences when…
Can you influence your epigenetic age through diet?
Multiple studies show that a healthy dietary pattern can favourably influence your epigenetic age, although these are…
Yes · Moderate evidence
What does too much sitting do to your biological clock?
Too much sitting demonstrably weakens your day-night rhythm, even after just one day. Moving more, and preferably in the…
Does your biological age advance more quickly when you are lonely?
Loneliness is associated with measurably faster biological ageing, and that association has been found across multiple…
Can you see your biological age in your blood pressure?
A rising systolic blood pressure and a widening gap between the upper and lower numbers are recognisable signs of vascular…
How reliable is a saliva test for biological age?
A saliva test provides a reasonable estimate of your calendar age, but does not measure exactly the same thing as a blood test…
Do you age faster if you have chronic pain?
Whether chronic pain makes you age faster depends strongly on the type of pain, the accompanying stress and depression, and…
Can your microbiome reveal how old you are biologically?
The bacteria in your gut change in recognisable ways with age and are linked to how healthily you grow old. The early evidence…
What is DunedinPACE and what does it tell us about ageing?
DunedinPACE measures how quickly you are ageing biologically and is associated with disease and premature death, but the test…
Does diabetes make a person age faster biologically?
Yes, diabetes measurably accelerates biological ageing: the risk of cardiovascular disease, dementia and early death…
Which blood markers can tell you how fast you are biologically ageing?
Blood markers such as protein profiles, DNA-tag patterns, telomere length and standard inflammation markers each offer their…
What does alcohol do to your biological age?
Alcohol accelerates multiple biological ageing processes, including gut damage, inflammation, and brain deterioration. The…
Is it true that women age more slowly biologically than men?
Multiple studies confirm that women are biologically younger than men of the same age, but women also spend their extra years…
Can meditation slow your biological clock?
Research shows that meditation has a beneficial effect on telomerase activity, an enzyme that protects cells from ageing. In…
Preliminary evidence
Does your biological age change differently at night than during the day?
The night is biologically not a pause but an active recovery phase, and that phase deteriorates noticeably with age. Those who…
Does the time you eat affect your ageing?
The time at which you eat does appear to matter, although the evidence in humans is still associative. A nightly fasting…
Yes · Moderate evidence
What is the Horvath clock and why is it so well known?
The Horvath clock was the first biological age measure that worked broadly across virtually all tissues, and that is what…
How quickly can you change your biological age with exercise?
Regular moderate to vigorous exercise is associated with a biological age that comes out 1 to 3 years lower, and molecular…
Moderate evidence
Can a blood test reveal how old your organs are?
A blood test can estimate the biological age of individual organs, and accelerated ageing is clearly associated with more…
Does your skin age faster than your organs?
It has not been proven that skin as an organ naturally ages faster than your internal organs, but it is more vulnerable to sun…
Do your cells actually get younger when you restrict calories?
Calorie restriction demonstrably slows the biological rate of ageing in cells, including in people. An approach such as the…
What does smoking do to your biological age?
Smoking measurably accelerates the biological ageing of lung cells, the immune system, and the reproductive system. Stopping…
Can fasting turn back your biological age?
Fasting, particularly intermittent fasting and ketogenic diets, moves multiple biological ageing markers in a favourable…
Moderate evidence
What does an epigenetic clock actually measure?
An epigenetic clock reads chemical labels on your DNA to estimate your biological age, which already says something about your…
Does insulin resistance accelerate ageing?
Insulin resistance is associated with measurably faster biological ageing, greater muscle loss, and possibly a higher risk of…
Yes · Moderate evidence
How do telomeres protect your DNA?
Telomeres protect your chromosome ends through a system of proteins that simultaneously prevents false alarms and harmful…
Why do your telomeres get shorter as you age?
Telomeres shorten because the copying process during cell division cannot fully reproduce the ends of chromosomes, and the…
Does NAD+ supplementation slow biological ageing?
NAD+ supplements reliably raise your blood levels. Whether that also slows biological ageing has not yet been demonstrated in…
No · Preliminary evidence
What is the difference between living longer and living longer in good health?
Healthspan and lifespan are two separate things: you can live a long time yet lose years to illness and decline. Calorie…
What does the stress hormone cortisol do to my ageing?
Chronically elevated cortisol accelerates muscle loss and disrupts your metabolism, and that effect is real. Good sleep and…
Can you have your telomeres measured, and is there any value in doing so?
A telomere test is technically possible but currently provides little actionable information for you as an individual, because…
Yes · Moderate evidence
Do I inherit my life expectancy from my parents?
Genetics explains roughly one third of how long you live, so your parents give you a biological starting point, not a…
Do people age through different organs?
Yes, people age through different organ pathways. The science needed to map this precisely for each individual is promising,…
Can you tell someone's biological age from their face?
Your face does emit biological signals, but it is too limited and too variable to measure your biological age accurately. Take…
Does everyone age at the same rate?
At the molecular level everyone ages at a broadly similar baseline rate, but in terms of health and life expectancy people can…
Does my walking speed say anything about how fast I am ageing?
Yes, your walking speed says something about how your body is ageing. People who walk slower than 0.8 to 1.0 metres per second…
How big is the difference between your biological and calendar age?
The typical spread between your biological and calendar age is around one to two years. Studies name no firm upper limit, but…
What is young blood / plasma exchange, and does it actually work?
Plasma exchange clearly works in mice, but in humans there is still no evidence whatsoever of efficacy or safety. Do not be…
Preliminary evidence
Does hyperbaric oxygen therapy help against ageing?
HBOT shows interesting signals in small, early studies regarding telomere length and cerebral blood flow, but the evidence is…
Preliminary evidence
Are DNA methylation tests for biological age worth the money?
The underlying technology has scientific merit, but commercial tests have not yet been independently validated and the…
Moderate evidence
Can you really lower your biological age, and does research support this?
There are promising hints that biological age is measurable and perhaps steerable, but this has not been proven. Wait for…
Preliminary evidence
How reliable are epigenetic clocks?
Epigenetic clocks are reliable predictors of health risks and the chance of dying sooner, but as an individual measurement…
Which lifestyle factors influence your biological age the most?
Sitting for prolonged periods, a disrupted circadian rhythm and muscle loss are the best-supported negative factors for your…
Moderate evidence
What does your VO2max say about how fast you are ageing?
A higher VO2max is strongly associated with lower mortality and a more favourable biological age, but is more of a gauge of…
How can I measure my biological age?
Epigenetic clocks, particularly GrimAge and PhenoAge, currently offer the best estimate of your biological age, but they are…
Moderate evidence
How does ageing work and how can you slow it down?
Ageing is well described biologically, but there are no proven means of genuinely slowing it in humans yet. For now, focus on…
Moderate evidence
Are biological age tests actually accurate?
Biological age tests such as GrimAge and DunedinPACE are associated with health outcomes in scientific research, but no…
Moderate evidence
What are telomeres and can I keep them longer?
Telomeres protect your genetic material, and they shorten over the years, largely determined by your genes. Whether you can…
Strong evidence
Does stress make you age faster?
Prolonged stress measurably accelerates your biological ageing. Healthy habits can noticeably slow that process.