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Biological age tests: Should you get one?

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28/09/2025
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Biological age tests: Should you get one?
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For those who’ve heard of billionaire Bryan Johnson, you’ve possible encountered the phrase “bio age testing.”

Johnson, the topic of the Netflix documentary Don’t Die, says he’s on a quest to realize the bottom potential “organic age” (also called bio age).

He reportedly spends tens of millions annually on anti-aging remedies—dozens of each day dietary supplements, weekly acid peels for his pores and skin, injections to spice up collagen manufacturing, hyperbaric oxygen remedy, and plasma infusions extracted from his 17-year-old son’s physique.

To find out what’s working, Johnson has undergone quite a few assessments to evaluate his bio age. Johnson says these assessments present his age is now 5.1 years youthful than when he launched into his anti-aging quest.

Apparently, he’s getting old in reverse.

Granted, not everybody’s shopping for it. A New York Occasions exposé, for instance, claims Johnson’s organic age, in actuality, has elevated by 10 years.1

Nonetheless, Johnson’s “don’t die” campaign is gaining traction.

Bio age assessments are a frequent subject on well-liked podcasts by Peter Attia, Joe Rogan, and Andrew Huberman. Google “bio age testing” and also you’ll see dozens of adverts for mail-order blood or urine testing kits that declare to disclose your organic age, tempo of getting old, and extra. With costs tumbling into affordability, it’s pure to marvel…

Do you have to or your shopper join bio age testing?

If that’s the case, which take a look at is finest? Simply as importantly, what do you have to do with the data?

On this story, you’ll study:

What’s your bio age?

Your organic age (bio age) refers to how your cells perform. It’s not essentially the identical as your chronological age, which refers back to the variety of candles in your birthday cake.

For instance, let’s say Chang, a 50-year-old man, works at a desk, spends his free time in entrance of the TV, lives in essentially the most polluted metropolis on the earth, eats a sweet bar for lunch, and smokes. Then again, Jabari, a unique 50-year-old man, hits the fitness center a number of occasions per week, lives within the mountains, doesn’t smoke, relishes his 5 servings of veggies a day, meditates, and spends most evenings in his backyard.

Genetics apart, you’d be sensible to wager that Jabari’s bio age is youthful than Chang’s.

How do these assessments measure bio age?

Bio age testing kits measure a number of organic markers of getting old, also called biomarkers.

For instance, some assessments give attention to the scale of your telomeres, the protecting caps on the ends of chromosomes. Others measure DNA methylation, a physiological course of that chemically alters DNA.

As soon as an organization isolates and measures these markers out of your blood or urine, it plugs the bio information right into a system that calculates your bio age.

Nonetheless, when you see a health care provider with any regularity, you’re possible already monitoring some biomarkers of getting old. For instance, biomarkers corresponding to blood stress, levels of cholesterol, and blood glucose may also help predict your threat of future heart problems, a number one reason behind untimely demise.

What’s the purpose of biomarker testing?

Biomarker testing may also help you monitor your wellness proactively somewhat than ready for illness signs to look.

For some, it additionally serves as a motivator. For those who study you may have the bones of somebody 20 years older, this may occasionally provide the nudge you’ll want to begin power coaching constantly.

As well as, biomarkers present goal information, permitting you to trace and consider numerous health-related actions quantitatively. By monitoring your blood stress, you would possibly study that constant train helps, however your late-afternoon vitality drink does the other.

5 FREE biomarker assessments

You don’t need to be a billionaire (or perhaps a millionaire) to trace biomarkers of getting old.

On this part, we’ll cowl a number of massively underappreciated, scientifically validated assessments you need to use to realize perception into your bio age—for FREE.

Earlier than scientists developed high-tech blood-based bio age assessments, researchers used these free assessments to calculate the tempo of getting old within the individuals they studied.

FREE biomarker take a look at #1: Get off the ground

People who find themselves fitter and stronger are inclined to stay longer.2

That’s as a result of muscle groups do extra than simply transfer us round. Additionally they secrete anti-inflammatory substances, assist to manage blood sugar, gradual mobile getting old, defend the liner of the arteries, and extra. All this helps scale back the chance of age-related ailments, corresponding to sort 2 diabetes, hypertension, and coronary heart illness, a phenomenon we discover in our article, The New Science of Muscle.

Associated to power, your skill to stability can also be key. For those who’re middle-aged or older and may’t stand on one foot for at the very least 10 seconds, your threat of dying within the subsequent seven years is double that of somebody who can stand for longer, in line with a research of 1,700 individuals.3

The Sitting-Rising Take a look at (SRT) is one method to assess each power and stability on the similar time.

Folks with low scores on this take a look at have a better threat of dying from heart problems, in line with a 12-year research of 4,200 adults between the ages of 46 and 75.4

▶ Tips on how to measure it

Decrease your self to the ground along with your legs in a crisscross place. Then, along with your legs in the identical place, stand again up. As you stand, discover when you should use part of your physique—hand, shin, knee—as leverage.

To attain your self, begin with 10 factors. Then, for every physique half you used to face, deduct a degree. Subtract a half level when you turned unsteady or misplaced your stability.

Understand that this (and different assessments) function a proxy on your health. A low rating signifies that your stability and coordination, muscle power and energy, and mobility might all require some consideration.

FREE biomarker take a look at #2: Squeeze a ball

Just like the SRT take a look at, your grip power offers perception into your total health. If the muscle groups in your fingers are weak, the muscle groups all through your physique usually tend to be weak, too.

Poor grip power can even predict future muscle weak spot. In a single research, individuals with a weak grip had been extra more likely to stroll slowly and be unable to rise from a chair, full rigorous house responsibilities, or climb a flight of steps 25 years later.5

Low grip power has additionally been related to:6

  • Low bone mineral density
  • Elevated threat of falls
  • Poor dietary standing
  • Melancholy
  • Poor sleep, cognitive perform, and/or high quality of life
  • Elevated threat of coronary heart illness, most cancers, and untimely mortality

In line with one research, grip power was a greater indicator of longevity (or lack thereof) than blood stress.7

▶ Tips on how to measure it

Seize a regular tennis ball, and squeeze as arduous as you’ll be able to, for so long as you’ll be able to.

For those who can handle 15 to 30 seconds earlier than your grip fatigues, you’re doing fantastic. Ninety seconds places you nicely above common—something over 90 ranks you solidly within the upper-third percentile.

For those who’re beneath 15, remember the fact that this take a look at can also be only one indicator of your total power. (And squeezing balls to enhance grip power with out coaching the remainder of your physique is unlikely to make important enhancements in your total well being and health.)

A hand-held dynamometer—accessible to be used at most occupational therapists’ and a few gyms—can even take a look at grip power. (For those who’re prepared to shell out some money, you should buy your individual for someplace between $100 and $500.)

FREE biomarker take a look at #3: Stand on one foot

A capability to stability on one foot for an prolonged interval may also help scale back your threat of falls, one of many main causes of injury-related demise amongst older adults.

As well as, many various bodily methods—the eyes, inside ear, skeletal muscle groups, and mind—should work collectively that can assist you keep upright.

Situations like diabetes, coronary heart illness, and most cancers can all have an effect on stability. Consequently, an incapability to face on one foot can function a warning signal for eroding well being and health.8

▶ Tips on how to measure it

Stand close to a wall or chair for security. Preserve your eyes open and fingers in your hips. Then, raise your dominant leg and begin timing your self. As soon as you set your foot down, cease the clock. Repeat the take a look at along with your non-dominant leg.

After getting your occasions, evaluate them to the next averages, from a research out of Duke College, to see how you probably did in comparison with your age-matched friends.9

Age Seconds on one leg (males) Seconds on one leg (females)
30-39 59 56
40-49 56 55
50-59 42 48
60-69 40 38
70-79 27 25
80+ 13 11

FREE biomarker take a look at #4: How you’re feeling

Generally why you’re drained, such because the morning after binge-watching the previous couple of episodes of a thriller. When you compensate for your sleep, the weariness lifts.

That’s not the identical factor as fatigue, which describes persistent exhaustion that worsens over time and interferes with life. Along with feeling bodily drained, somebody who’s fatigued feels mentally boring and emotionally exhausted.

Consider fatigue as an early signal that one thing’s off, particularly when you don’t know the trigger.

Let’s say you’ve already dominated out the same old suspects like an excessive amount of caffeine, dehydration, an excessive amount of alcohol, remedy unintended effects, power stress, or an excessive amount of or too little train. What’s left is probably going a sleep problem or a creating well being downside corresponding to anemia, weight problems, despair, most cancers, or diabetes, to call a couple of.

For those who’re 60 or older, fatiguability—or how worn out you’re feeling after an exercise—can even predict longevity.

In line with analysis out of the College of Pittsburgh Medical Middle, the upper somebody scores in fatiguability, the upper their threat of demise sooner or later.10 Different analysis has linked excessive fatiguability with declines in gait pace, strolling skill, and different assessments of health.11

▶ Tips on how to measure it

To measure fatigability, use a device referred to as the Pittsburgh Fatigability Scale. Utilizing a 0 (no fatigue) to five (excessive fatigue) scale, price how fatigued you assume you’ll really feel after finishing the next actions:

Exercise Length Rating (0 to five)
Leisurely strolling half-hour
Brisk or quick strolling 1 hour
Mild family exercise 1 hour
Heavy gardening or yard work 1 hour
Watching tv 2 hours
Sitting quietly 1 hour
Reasonable-to-high depth power coaching half-hour
Collaborating in a social exercise 1 hour
Internet hosting a social occasion for 60 minutes 1 hour
Excessive depth exercise half-hour
Add all scores:

For those who rating lower than 15, you’re doing nicely. Scores between 15 and 24 are a warning signal. Something 25 and above is thought to be extreme, and price mentioning to your healthcare skilled.12

FREE biomarker take a look at #5: Physique composition

Regardless of well-liked perception, each too little and an excessive amount of physique fats can affect well being for the more serious, as we discover in our infographic, Is body fat good or bad for you?

An excessive amount of fats raises the chance for: Too little muscle raises threat for:
Coronary heart illness Coronary heart illness
Hypertension Hypertension
Most cancers Most cancers
Fatty liver illness Stroke
Insulin resistance Insulin resistance
Sort 2 diabetes Sooner mobile getting old
Irritation Irritation
Joint misery Melancholy and anxiousness
Sleep apnea Falls and lack of stability

Your muscle mass additionally performs a task, which is why somebody’s physique composition issues greater than their weight.

The gold commonplace strategies that estimate physique composition—underwater weighing, air displacement (Bod Pod), and dual-energy X-ray absorptiometry (DEXA)—definitely aren’t free.

Nonetheless, a current research decided {that a} good old style (and low-cost) tape measure can present a comparably correct estimate of physique composition.13

▶ Tips on how to measure it

To make use of a tape measure to maintain monitor of your physique fats share, measure:

  • The widest a part of your neck
  • The narrowest a part of your waist (For some individuals, this can be on the navel. For others, it is perhaps barely above the navel)
  • The widest a part of your hips

Make sure the tape is cosy however not so tight that it cuts into the pores and skin. After getting your measurements, plug these numbers—alongside along with your age, intercourse, peak, and weight—into our FREE Body Fat Calculator, which can take it from there.

Physician-approved biomarker assessments

Relying on the place you reside on the earth, the next assessments will not be free. Nonetheless, as a part of routine preventative care, your insurance coverage would possibly cowl them.

Physician-approved take a look at #1: Blood panel

In case your major care physician recommends yearly blood work, it’s for good motive.

By protecting tabs on a number of blood markers, you’ll be able to see in case your well being is trending towards sort 2 diabetes or coronary heart illness, each main causes of untimely mortality.

Many blood markers may also be influenced comparatively rapidly (inside 6 to 12 weeks) by means of way of life adjustments, complement protocols, or medicines. This makes them sensible instruments for monitoring whether or not numerous way of life or medical modifications are working.

▶ Tips on how to measure it

For those who’re not already doing so, think about having the next blood markers examined yearly. Then, discuss to your well being care skilled about what your numbers imply. They could use the next numbers, alongside along with your blood stress, to calculate a heart problems threat rating.

Blood marker Optimum vary
Complete ldl cholesterol < 200 mg/dL*
LDL < 100 mg/dL for these with out coronary heart illness
< 70 mg/dL for these with a historical past of coronary heart assault or stroke
HDL > 60 mg/dL
Triglycerides < 150 mg/dL
Alipoprotein B (Apo B) < 133 mg/dL (males)
< 117 mg/dL (females)
Lipoprotein (a) < 30 mg/dL
C-reactive protein < 2.0 mg/L**
Fasting glucose < 100 mg/dL
Hemoglobin A1C < 5.7%

*Milligrams per deciliter of blood
**Milligrams per liter

Physician-approved take a look at #2: Bone density

When researchers research wholesome super-agers aged 90 and older, sturdy bones are one among their defining options.14

That could be as a result of, like muscle groups, bones are stay organs that secrete substances that could be helpful to total well being and longevity.15

For instance, bones secrete osteocalcin, a hormone that performs a task in bone reworking. When osteocalcin circulates within the physique, it’s thought to play a task in every part from serving to muscle groups to provide ATP to regulating mind neurotransmitters.

Due to these diversified roles, it’s thought that, as bones put on away, osteocalcin ranges drop, contributing to many age-related well being issues, together with diabetes, low muscle mass, and cognitive points.16 17 (At the least, that’s the speculation. Most of this analysis has been achieved on mice.)

Osteocalcin apart, lack of bone density can, after all, result in fractures, which might enhance your threat of demise for as much as 10 years after a break.18

It’s particularly essential to maintain tabs on bone well being when you’re in any of those high-risk classes:

  • You’re feminine and went by means of menopause earlier than age 45.
  • You’ve been sedentary most of your grownup life.
  • You are taking medicines corresponding to diuretics or stomach-acid blockers, that are linked with an elevated threat of osteoporosis.
  • You have got a historical past of nicotine use or extreme alcohol consumption.
  • You have got a medical situation, corresponding to diabetes or thyroid illness, that raises your threat.
  • You have got a household historical past of osteoporosis.

▶ Tips on how to measure it

Twin-energy X-ray absorptiometry (DEXA) scans are a sort of X-ray that measures the quantity of bone mineral content material packed right into a sq. centimeter of bone.

Insurance coverage usually gained’t cowl these scans for individuals youthful than 65 except there’s a documented threat of creating osteoporosis. Out of pocket, the common price is about $300.

While you obtain your DEXA outcomes, you’ll see a T-score that represents how your bone density compares to the common bone density of a younger grownup with peak bone mass. A T-score of +1.0 to -1.0 means you may have regular bone mineral density for somebody your age. Something beneath -1.0 means you might need osteopenia (low bone mineral density) or osteoporosis (porous bones which are liable to fracture).

Industrial bio age assessments

When you’ve got some cash to burn, you’ll be able to study an terrible lot about your physique.

Right here, you’ll discover a fast run-down on among the extra high-tech assessments you may get and what they’ll let you know.

Nonetheless, earlier than we get into the small print, we need to level out a couple of caveats:

▶ Organic age can differ over time, and by organ. Somebody might undergo a interval of accelerated getting old—saying, throughout a interval of intense stress—then their price of getting old might gradual as they focus extra on restoration. Moreover, organs can age at completely different charges. For instance, somebody with coronary heart illness might have a comparatively older coronary heart than their kidneys. (Not all assessments measure particular person organ age, however it’s turning into extra frequent.)

▶ Industrial assessments gained’t all the time precisely replicate the adjustments you’re making. Till extra analysis helps the reliability of those assessments, consider your behaviors over remoted take a look at outcomes. For those who’re consuming extra fruits and veggies, exercising extra constantly, managing stress, and in any other case slaying the wholesome way of life division, don’t sweat your outcomes. Deal with doing the issues we all know enhance well being.

▶ If an organization pairs your take a look at outcomes with a tough promote for a proprietary and costly complement protocol, be cautious. It’s higher to share and talk about your outcomes with a trusted well being skilled than take well being recommendation from a profit-seeking stranger over the web.

Industrial take a look at #1: DNA methylation

DNA methylation is a organic course of that chemically alters DNA. As a result of the speed of methylation accelerates with getting old, it may be used to estimate somebody’s organic age and life expectancy, finds analysis.19 20 21

The Horvath Clock and DunedinPACE each measure particular biomarkers that can be utilized to raised perceive somebody’s methylation price. Scientists developed these assessments to assist different scientists research how numerous way of life components, environmental exposures, and medicines have an effect on getting old. They didn’t develop the assessments as a manner for the common individual to pinpoint their organic age. (Which hasn’t stopped corporations from promoting DNA methylation testing kits to the general public.) They price about $300.

For those who resolve to get one among these assessments, take into account your outcomes gained’t offer you a whole image of your well being and longevity. Getting old usually happens at various charges all through the physique. Your liver would possibly age quicker than your coronary heart or mind, for instance. So when you measure DNA methylation in your blood, that’s all about. Put one other manner, a DNA methylation take a look at isn’t an alternative choice to your annual wellness checkup or blood work.

Industrial take a look at #2: Telomere evaluation

Telomeres—the protecting caps on the ends of chromosomes—put on away with age. The size of a telomere can predict what number of occasions a selected cell can divide earlier than dying.

Abnormally quick telomeres are related to a number of genetic ailments. For that reason, when physicians suspect somebody might need inherited a genetic illness, they’ll order a selected sort of telomere take a look at—the flow-FISH take a look at—to measure the telomere size in all of the cells in a blood pattern.22 23

It’s extra debatable whether or not telomere assessments can predict getting old in wholesome individuals.

Simply as importantly, the telomere take a look at marketed to the general public, often known as the qPCR telomere take a look at, isn’t utilized in analysis or drugs. These $100 assessments are fantastic when you’re merely curious—simply don’t base well being and health choices in your outcomes.

Industrial take a look at #3: VO2 Max

For years, solely elite athletes cared about VO2 max, which describes the utmost quantity of oxygen that your physique can use throughout train.

Extra just lately, nonetheless, some consultants have steered that VO2 max can function a measure for athletes and non-athletes alike to trace the speed at which their our bodies are getting old.

Folks with excessive VO2 max have a tendency not solely to be extra bodily match but in addition much less more likely to develop coronary heart illness, diabetes, most cancers, or stroke.24 25 26 27

In an observational research that adopted the well being outcomes of 5,107 Danish males over 46 years, males with above-average V02 max throughout center age lived a mean of 5 years longer than males with below-average V02 max. Every unit enhance in VO2 max was related to a 45-day enhance in longevity. The researchers steered VO2 max might extra precisely predict all-cause mortality than excessive ldl cholesterol, weight problems, hypertension, and insulin resistance.28

You would possibly consider V02 max as a canary and your getting old physique as a coal mine.

As you age, your chest wall turns into extra inflexible, the muscle groups that encompass the lungs weaker, and the oxygen-carrying blood vessels calcified and fewer elastic. The center additionally squeezes with much less power, max coronary heart price drops, muscle mass and power decline, the mitochondria in cells and muscle groups lose their effectiveness, amongst different variations.

Along with elevating your threat for a lot of completely different ailments, these adjustments can even have an effect on VO2 max, which tends to say no 10 % per decade beginning round age 30.29 30

Prior to now, the one method to reliably measure VO2 max was in a health lab.

You’ll put on a metabolic masks and a coronary heart monitor when you ran or cycled to exhaustion. The masks collected your expired carbon dioxide and monitored how a lot oxygen you sucked into your lungs. This lab-based testing continues to be essentially the most correct method to measure V02 max in addition to different key health metrics corresponding to:

  • Max coronary heart price, or the very best variety of occasions your coronary heart can beat per minute throughout train
  • Ventilatory threshold 1, or the purpose throughout train when the physique switches from primarily utilizing fats for gasoline to utilizing a mixture of fats and glucose or glycogen (saved glucose) for gasoline.
  • Ventilatory threshold 2, or the purpose the place your physique strikes away from cardio metabolism (which makes use of oxygen) to anaerobic metabolism (which doesn’t use oxygen).
  • Tidal quantity is the quantity of air inhaled or exhaled throughout every breath

Relying on the place you reside, you would possibly be capable to get your VO2 max examined for round $150.

Nonetheless, when you don’t have entry to a VO2 max clinic, three considerably much less correct choices exist.

▶ The 1-mile stroll take a look at

Put on a coronary heart price monitor as you stroll one mile on a flat floor, corresponding to a treadmill or working monitor. As quickly as you full the mile, report your coronary heart price and stroll time. Then, plug it into the next system to calculate your VO2 max:

132.853 — (0.0769 × Weight) — (0.3877 × Age) + (6.315 × Intercourse) — (3.2649 × Time) — (0.1565 × Coronary heart price)

If that appears like an excessive amount of math, it’s also possible to use a free online tool.

▶ The smartwatch take a look at

Many smartwatches will estimate your VO2 Max for you primarily based on info the watch gathers out of your exercises, intercourse, and age. In comparison with in-office testing, sensible watches can over- or underestimate V02 max, particularly in people who find themselves very off form or extraordinarily match.31

Due to this, you don’t essentially need to use your sensible watch measurement to find out your present state of well being. Nonetheless, it can allow you to to see tendencies. For instance, does your VO2 estimate drop after a couple of weeks of skipping your typical spin class? If that’s the case, that’s good info to have.

▶ The PR take a look at

Health efficiency correlates with longevity. For those who’re getting quicker at working a sure distance or can go an extended distance than earlier than, you’re getting fitter and growing your probabilities of dwelling a protracted, wholesome life.

One method to take a look at this: the 12-minute run take a look at, also called the Cooper take a look at. (This can be a validated method to estimate VO2 max—and reveals a few 90 % correlation with lab-based measurements.)

Right here’s the way it works:

Run as quick as you’ll be able to on a flat floor, corresponding to a treadmill set at a 1 % incline or working monitor, for 12 minutes. After 12 minutes, report your distance. Then, plug it into one of many following formulation to calculate your VO2 max.

Distance in Miles Distance in Kilometers
VO2 Max = (35.97 x distance in miles) – 11.29 (22.351 x distance in kilometers) – 11.288

In lieu of doing math, it’s also possible to use a free online calculator.

Tips on how to change your organic age

Attempt to think about the data you collect about your physique as simply that—info.

It’s not an ethical judgment of who you might be as an individual.

Simply as importantly, it’s not a everlasting state of affairs.

  • For those who’re weaker than different individuals your age, you’ll be able to develop stronger.
  • In case your ldl cholesterol or blood glucose ranges are excessive, you’ll be able to take steps to decrease them.
  • In case your physique is getting old quicker than your birthdays, think about exploring key way of life adjustments that will assist flip the state of affairs round.

You have got choices. Nonetheless, most individuals make two huge errors relating to longevity-related way of life adjustments.

Mistake #1: Ignoring evergreen, big-impact methods

It’s the straightforward, boring, “I’ve heard this 1,000,000 occasions earlier than” well being practices that, when achieved constantly, add as much as a protracted, wholesome life.

We’re speaking about issues like…

  • Consuming extra minimally processed meals and fewer ultra-processed meals
  • Consuming extra brightly coloured fruits and veggies
  • Transferring your physique often
  • Getting sufficient relaxation and sleep
  • Having fun with group, time in nature, and different actions that make life significant
  • Preserving alcohol consumption reasonable
  • Not utilizing tobacco
  • Carrying sunscreen
  • Flossing

And that’s only a partial record.

In line with 1000’s of research, individuals who apply these and different high-impact methods not solely stay longer, but in addition stay higher. They’re stronger, happier, and fewer more likely to spend their later years disabled or in ache.

(For those who’d prefer to see the place you stand relating to huge influence well being and longevity methods, try our FREE Longevity Assessment.)

Nonetheless, relating to well being, health, and longevity, many individuals pursue choices with minimal influence (at finest). They attain for the most recent, stylish complement somewhat than taking steps to stop smoking, as only one instance.

Right here’s the factor: Massive rock methods require adjustments in conduct. If each day bodily exercise had been as straightforward as popping a tablet, walkers and cyclists would clog up the streets in your neighborhood.

(It’s exactly this motive why so many individuals want the help of a certified health coach who has undergone coaching within the science of conduct change.)

Mistake #2: Not turning information into motion

The information gathered from biomarker getting old assessments can provide you a way of management.

Nonetheless…

Information, in isolation, doesn’t result in an extended life.

Gathering information with out altering your conduct is like checking your reflection within the mirror, seeing spinach wedged between your incisors, and leaving it there.

You might want to take away the spinach for the mirror verify to be worthwhile.

Biomarker testing is identical.

For those who don’t use your bio information to tell conduct change, you’re losing your time and money.

Take into account your biomarker information as a baseline or start line.

Then, use it to evaluate whether or not numerous way of life adjustments or medical interventions are transferring you nearer to your aim of dwelling an extended, more healthy life.

References

Click on right here to view the data sources referenced on this article.

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7. Leong DP, Teo KK, Rangarajan S, Lopez-Jaramillo P, Avezum A Jr, Orlandini A, et al. Prognostic value of grip strength: findings from the Prospective Urban Rural Epidemiology (PURE) study. Lancet. 2015 Jul 18;386(9990):266–73.

8. Rezaei A, Bhat SG, Cheng C-H, Pignolo RJ, Lu L, Kaufman KR. Age-related changes in gait, balance, and strength parameters: A cross-sectional study. PLoS One. 2024 Oct 23;19(10):e0310764.

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