How to Lower Your Biological Age: What the Evidence Actually Supports
Biological age responds to modifiable habits like exercise, sleep, and diet. Here's what the epigenetic aging research actually supports, and what doesn't.
8 min read
Biological age can move in both directions
Unlike chronological age, biological age isn't fixed. Multi-cohort research tracking epigenetic aging tools like DunedinPACE has found that the pace of biological aging responds, in both directions, to a relatively short list of modifiable factors.
The encouraging part isn't that a single habit resets the clock, it's that the same everyday behaviours which drive most chronic disease also move the pace of aging itself.
What the evidence says slows it down
Physical activity
Consistent exercise, both cardio and resistance training, is one of the most reliably observed factors associated with a slower pace of aging across multiple epigenetic clock studies. It's the single lever with the broadest supporting evidence.
Diet quality
Diets higher in whole foods and lower in ultra-processed foods and added sugar are associated with slower biological aging, likely through their effects on inflammation and metabolic health.
Sleep
Poor sleep duration and quality are consistently linked to accelerated biological aging markers, plausibly through elevated cortisol and inflammatory signaling.
Body composition
Higher BMI, and particularly higher visceral fat, is one of the more consistent accelerants of biological aging across studies.
What the evidence says speeds it up
Smoking, one of the strongest and most consistent accelerants identified across nearly every epigenetic clock study
Chronically elevated blood glucose
Poorly controlled blood pressure
Chronic, unmanaged stress
What doesn't have strong evidence yet
Many supplements and interventions marketed as "anti-aging" haven't been tested against biological age clocks in rigorous human trials. Evidence quality varies enormously across this category, and it's worth being skeptical of specific product claims that outrun the research behind them.
The fundamentals, movement, diet, sleep, and not smoking, carry far more evidence than any pill currently on the market.
Measuring whether it's working
The only way to know whether a change in diet, training, or sleep is actually moving your biological age is to measure it before and after. Precursor pairs biological age testing with a full biomarker panel, so you can see which specific levers are driving the number, and confirm progress with data instead of guesswork. Start with a baseline test.
Frequently asked questions
Can you really lower your biological age?
Yes. Unlike chronological age, biological age isn't fixed. Multi-cohort research using epigenetic aging tools like DunedinPACE shows the pace of aging responds in both directions to modifiable lifestyle factors, meaning it can be slowed.
What lifestyle changes lower biological age?
The best-supported factors are consistent exercise (both cardio and resistance training), a diet higher in whole foods and lower in ultra-processed foods and sugar, good sleep, and healthy body composition with lower visceral fat. Exercise has the broadest supporting evidence.
What speeds up biological aging?
Smoking is one of the strongest and most consistent accelerants across nearly every epigenetic clock study. Chronically elevated blood glucose, poorly controlled blood pressure, and chronic unmanaged stress are also linked to a faster pace of aging.
Do anti-aging supplements lower biological age?
Most supplements marketed as anti-aging haven't been tested against biological age clocks in rigorous human trials, and evidence quality varies widely. It's worth being skeptical of product claims that outrun the research. The fundamentals of movement, diet, sleep, and not smoking carry far more evidence.
How long does it take to lower biological age?
There's no fixed timeline, and it varies by the tool used and the changes made. Because biological age reflects sustained patterns rather than single actions, it's best assessed over months, by re-testing after a consistent period of change rather than expecting rapid shifts.
How do I know if my biological age is decreasing?
The only reliable way is to measure before and after. Testing your biological age alongside a full biomarker panel lets you see which specific levers are driving the number and confirm progress with data rather than guesswork.
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