How to Lower Your Biological Age: What Actually Works

You can't reverse the calendar, but "biological age" isn't the calendar — it's a number calculated from biomarkers like blood glucose, inflammation, liver and kidney markers, fitness and body composition. Those genuinely respond to how you live. So lowering your biological age is real in a specific sense: you improve the inputs the score is built from. And the levers that move them most are unglamorous and mostly free — not the supplements sold alongside the idea.

What "lowering biological age" really means#

Biological-age scores come in two families. Epigenetic clocks read DNA methylation; composite scores like PhenoAge combine nine routine blood markers with your age. Both are estimates of how your body is faring relative to the calendar — and both are just functions of measurable inputs.

That's the useful framing. You're not chasing a mystical rejuvenation; you're moving glucose, blood pressure, inflammation (CRP), lipids, fitness and muscle in the right direction. Do that and the number follows. Chase the number directly — through a supplement that promises to "reset your age" — and you usually move nothing real.

What actually moves it#

The evidence is remarkably consistent, and it points at the same short list that reduces all-cause mortality.

Lever	Why it matters	Where to start
Cardiorespiratory fitness	VO2max has the strongest mortality link of any modifiable factor	Regular cardio, including easy zone 2 plus some intervals
Not smoking	The single largest avoidable driver of early death	Stopping at any age adds years back
Body composition	Visceral fat drives insulin resistance and inflammation	Waist under half your height; strength training
Metabolic markers	Glucose, lipids and blood pressure feed the score directly	Diet quality, movement, weight, medication if needed
Sleep	Short and disrupted sleep worsens glucose and inflammation	7–9 hours, consistent timing
Muscle mass	Guards against sarcopenia and frailty with age	Two strength sessions a week

If you do only one thing, make it fitness. In a study of over 120,000 people, higher cardiorespiratory fitness tracked with lower mortality across the board, with no observed ceiling of benefit — and unlike your chronological age, fitness is trainable at any age.

Читайте также: VO₂max: The Central Marker of Fitness and Lifespan

What's oversold#

The longevity market runs ahead of the evidence, and biological age is its favourite hook.

This isn't nihilism. It's triage: the boring, free levers have decades of evidence, and the paid shortcuts don't. Spend your effort and money in that order.

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How to track it honestly#

You don't need a subscription to see whether this is working. A standard blood panel already contains most of what PhenoAge uses — glucose, CRP, albumin, liver and kidney markers, white cell count — and repeating it once or twice a year shows the trend that matters.

Pair that with a few things a lab can't sell you: resting heart rate, waist circumference, how much you can lift, and how you handle a brisk 20 minutes. Those move first, and they move fastest.

Читайте также: Biological Age Calculator: PhenoAge From a Blood Test

Run your own numbers, change the levers above, and check again in a few months. A biological age that falls while your blood markers improve is the honest version of "getting younger" — and the only version you can actually buy.

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