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 larger studies in people before basing major decisions on this.
Biological age can now be measured using epigenetic clocks. These are tools that look at chemical tags on your DNA that shift as you get older. Well-known examples include the Horvath clock, PhenoAge and GrimAge. They reliably predict your risk of disease and death, making them useful as risk indicators, but they have not yet been proven to be a steering wheel you can turn.
Whether you can actually lower that biological age is a question that research is actively exploring, but has not yet answered. A broad overview of the field describes the results as promising, yet the authors are explicitly cautious. Many of the studies are small or methodologically weak. Firm conclusions about which supplement, diet or treatment works cannot yet be drawn.
A striking example from experimental research is an animal study. Researchers used a temporary mRNA therapy directed at the liver to restore immune signals. This led to better production of immune cells, stronger responses to vaccines and improved anti-tumour immunity. The effects were also reversible after the therapy was stopped. But this has been demonstrated in mice only. Whether it works in people is entirely unknown.
Honestly, there is currently no approach that has been proven to genuinely and lastingly lower your biological age. The measurement tools exist, the first hints are there, but solid proof in people is still missing. Products or programmes that do promise this are running far ahead of what research justifies so far.
Based on two sources: an overview of epigenetic clocks and lifestyle interventions and an animal study on mRNA immune therapy. No large studies combining many participants or broad evidence summaries are available among the provided sources.
Can fasting turn back your biological age?
Fasting, particularly intermittent fasting and ketogenic diets, moves multiple biological ageing markers in a favourable direction. Whether this truly translates into a younger biological age over the long term has not yet been proven, but you can already start with a fasting method that suits you.
How can I measure my biological age?
DNA clocks, and GrimAge in particular, give the most reliable picture of your biological age. These measurement methods are currently used mainly in research.
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 not actively lower it. The evidence is still too thin for firm conclusions, but 600-900 mg of NMN per day appears safe and also improved walking ability in that same study.
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 changes in muscles are measurable after just a few weeks. Whether a lower score on an epigenetic clock truly means living healthier or longer has not yet been proven: treat it as an encouraging signal, not a guarantee.
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 protect their sleep rhythm, with fixed times, limited screen use before bedtime and a longer nightly eating break, preserve that recovery function for longer.
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 small study without a placebo group, conducted by researchers with a commercial interest. Wait for the results of the ongoing independent study before drawing any conclusions.