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What Is Biological Age and How Do You Measure It?

Affiliate & partner disclosure: This article contains affiliate links, and I may earn a commission if you buy through them at no extra cost to you. As an authorised LifeWave Brand Partner, I have a financial interest in promoting LifeWave products. Testimonial/editorial given by a LifeWave brand partner with financial interest in promoting the product. Full disclosure at the end.

A note before we start. This is general information, not medical advice. Consumer biological-age tests vary in accuracy and aren’t diagnostic. No LifeWave product — patch or water system — lowers biological age or treats any condition.

Two 45-year-olds can be very different under the hood. Biological age tries to capture that — how your body is ageing compared with the calendar.

Key takeaways

  • Biological age estimates how your body is ageing relative to chronological age.
  • Epigenetic clocks are the leading research tool; consumer versions vary.
  • Simple measures — fitness, strength, waist, blood pressure, blood markers — are highly informative.
  • Exercise, diet, sleep and not smoking move the needle.

How it’s measured

Epigenetic clocks analyse DNA methylation patterns. Newer clocks like GrimAge and DunedinPACE better predict health outcomes. Consumer saliva and blood kits exist, but results vary between labs.

Telomere length is noisy as an individual measure.

Blood markers like hs-CRP, HbA1c and lipids are cheap and actionable.

Function: VO2 max, grip strength and muscle mass are strong predictors. I track body composition monthly on a Hume Body Pod and use a WHOOP.

Take the Body Age Challenge →

What speeds it up

Smoking, inactivity, poor sleep, excess visceral fat, poor diet, heavy drinking and chronic stress.

What helps

  • Exercise — both cardio and strength. I lift every second day and walk 10,000+ steps.
  • Mediterranean-style eating.
  • Sleep.
  • Not smoking; drinking less.

See biological age vs chronological age.

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Where does LifeWave fit? X39, which I wear daily, is a non-transdermal, general-wellness phototherapy patch that gently stimulates the skin with light to support the body’s natural energy flow for strength and stamina. It is not an anti-ageing or stem-cell product. X2O isn’t a biological-age product either, and I don’t own one.

Shop X39 at my LifeWave store →

Frequently asked questions

Biological vs chronological age?

Chronological is years lived; biological estimates how your body is ageing.

Can you reduce biological age?

Studies suggest lifestyle changes can shift some markers; the long-term meaning of short-term changes is still being studied.

Are home tests worth it?

Interesting but variable. Basic fitness and blood markers are cheaper and more actionable.

Do LifeWave products treat any condition?

No. No such claim is made. LifeWave products are not intended to diagnose, treat, cure or prevent any disease.

Related reading

Biological Age vs Chronological Age · Epigenetic Age · How to Track Your Longevity

Full disclosure. This article is general information, not medical advice. LifeWave products are not intended to diagnose, treat, cure or prevent any disease; statements about them have not been evaluated by the FDA. As an authorised LifeWave Brand Partner I have a financial interest in promoting LifeWave products. Hume Health links are affiliate links.

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The Body Age Challenge

8 simple at-home tests. Find out how old your body really is, get a 30-day plan for your weakest area, then challenge your mates to beat your score.

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Written by

Dave Prosser

I’m the founder of Simply Younger. I turned 50 this year and I’m in the best shape of my life: lifting every second day, 10,000+ steps, cold plunges and sauna, and a monthly body scan to keep me honest. I’m not a doctor. I document what actually works for men over 40, mistakes included.

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