August 29, 2025


For those who’ve heard of billionaire Bryan Johnson, you’ve doubtless encountered the phrase “bio age testing.”

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

He reportedly spends tens of millions annually on anti-aging therapies—dozens of day by 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 checks to evaluate his bio age. Johnson says these checks present his age is now 5.1 years youthful than when he launched into his anti-aging quest.

Apparently, he’s ageing 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 checks are a frequent matter on fashionable podcasts by Peter Attia, Joe Rogan, and Andrew Huberman. Google “bio age testing” and also you’ll see dozens of advertisements for mail-order blood or urine testing kits that declare to disclose your organic age, tempo of ageing, and extra. With costs tumbling into affordability, it’s pure to surprise…

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

If that’s the case, which check is greatest? Simply as importantly, what do you have to do with the data?

On this story, you’ll be taught:

What’s your bio age?

Your organic age (bio age) refers to how your cells operate. 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 probably the most polluted metropolis on this planet, eats a sweet bar for lunch, and smokes. Alternatively, Jabari, a distinct 50-year-old man, hits the fitness center a number of instances 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 smart to wager that Jabari’s bio age is youthful than Chang’s.

How do these checks measure bio age?

Bio age testing kits measure a number of organic markers of ageing, often known as biomarkers.

For instance, some checks deal with the dimensions 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 components that calculates your bio age.

Nonetheless, for those who see a physician with any regularity, you’re doubtless already monitoring some biomarkers of ageing. For instance, biomarkers similar to blood strain, levels of cholesterol, and blood glucose will help predict your danger of future heart problems, a number one reason behind untimely loss of life.

What’s the purpose of biomarker testing?

Biomarker testing will help you monitor your wellness proactively fairly than ready for illness signs to seem.

For some, it additionally serves as a motivator. For those who be taught you may have the bones of somebody 20 years older, this may increasingly provide the nudge it is advisable begin energy coaching persistently.

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

5 FREE biomarker checks

You don’t must be a billionaire (or perhaps a millionaire) to trace biomarkers of ageing.

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

Earlier than scientists developed high-tech blood-based bio age checks, researchers used these free checks to calculate the tempo of ageing within the folks they studied.

FREE biomarker check #1: Get off the ground

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

That’s as a result of muscle tissues do extra than simply transfer us round. In addition they secrete anti-inflammatory substances, assist to control blood sugar, sluggish mobile ageing, defend the liner of the arteries, and extra. All this helps scale back the chance of age-related illnesses, similar to sort 2 diabetes, hypertension, and coronary heart illness, a phenomenon we discover in our article, The New Science of Muscle.

Associated to energy, your capacity to stability can be key. For those who’re middle-aged or older and may’t stand on one foot for not less than 10 seconds, your danger of dying within the subsequent seven years is double that of somebody who can stand for longer, in accordance with a examine of 1,700 folks.3

The Sitting-Rising Check (SRT) is one solution to assess each energy and stability on the identical time.

Folks with low scores on this check have the next danger of dying from heart problems, in accordance with a 12-year examine of 4,200 adults between the ages of 46 and 75.4

▶ measure it

Decrease your self to the ground together with your legs in a crisscross place. Then, together with your legs in the identical place, stand again up. As you stand, discover for those who 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 some extent. Subtract a half level for those who turned unsteady or misplaced your stability.

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

FREE biomarker check #2: Squeeze a ball

Just like the SRT check, your grip energy supplies perception into your total health. If the muscle tissues in your palms are weak, the muscle tissues all through your physique usually tend to be weak, too.

Poor grip energy may predict future muscle weak spot. In a single examine, folks with a weak grip have been extra more likely to stroll slowly and be unable to rise from a chair, full rigorous housekeeping, or climb a flight of steps 25 years later.5

Low grip energy has additionally been related to:6

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

Based on one examine, grip energy was a greater indicator of longevity (or lack thereof) than blood strain.7

▶ measure it

Seize a normal tennis ball, and squeeze as laborious 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 wonderful. Ninety seconds places you properly above common—something over 90 ranks you solidly within the upper-third percentile.

For those who’re beneath 15, take into account that this check can be only one indicator of your total energy. (And squeezing balls to enhance grip energy with out coaching the remainder of your physique is unlikely to make vital enhancements in your total well being and health.)

A hand-held dynamometer—obtainable to be used at most occupational therapists’ and a few gyms—may check grip energy. (For those who’re prepared to shell out some money, you should purchase your personal for someplace between $100 and $500.)

FREE biomarker check #3: Stand on one foot

A capability to stability on one foot for an prolonged interval will help scale back your danger of falls, one of many main causes of injury-related loss of life amongst older adults.

As well as, many alternative bodily techniques—the eyes, interior ear, skeletal muscle tissues, and mind—should work collectively that will help you keep upright.

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

▶ measure it

Stand close to a wall or chair for security. Maintain your eyes open and palms in your hips. Then, elevate your dominant leg and begin timing your self. As soon as you set your foot down, cease the clock. Repeat the check together with your non-dominant leg.

After getting your instances, evaluate them to the next averages, from a examine 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 check #4: How you are feeling

Typically you understand why you’re drained, such because the morning after binge-watching the previous few 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 uninteresting and emotionally exhausted.

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

Let’s say you’ve already dominated out the standard suspects like an excessive amount of caffeine, dehydration, an excessive amount of alcohol, medicine unintended effects, persistent stress, or an excessive amount of or too little train. What’s left is probably going a sleep problem or a creating well being drawback similar to anemia, weight problems, despair, most cancers, or diabetes, to call just a few.

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

Based on analysis out of the College of Pittsburgh Medical Heart, the upper somebody scores in fatiguability, the upper their danger of loss of life sooner or later.10 Different analysis has linked excessive fatiguability with declines in gait pace, strolling capacity, and different checks of health.11

▶ measure it

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

Exercise Period 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
Average-to-high depth energy 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 properly. Scores between 15 and 24 are a warning signal. Something 25 and above is thought to be extreme, and value mentioning to your healthcare skilled.12

FREE biomarker check #5: Physique composition

Regardless of fashionable perception, each too little and an excessive amount of physique fats can affect well being for the more severe, as we discover in our infographic, Is physique fats good or unhealthy for you?

An excessive amount of fats raises the chance for: Too little muscle raises danger for:
Coronary heart illness Coronary heart illness
Hypertension Hypertension
Most cancers Most cancers
Fatty liver illness Stroke
Insulin resistance Insulin resistance
Sort 2 diabetes Quicker mobile ageing
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 normal strategies that estimate physique composition—underwater weighing, air displacement (Bod Pod), and dual-energy X-ray absorptiometry (DEXA)—actually aren’t free.

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

▶ measure it

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

  • The widest a part of your neck
  • The narrowest a part of your waist (For some folks, this will probably 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 together with your age, intercourse, top, and weight—into our FREE Physique Fats Calculator, which is able to take it from there.

Physician-approved biomarker checks

Relying on the place you reside on this planet, the next checks is probably not free. Nonetheless, as a part of routine preventative care, your insurance coverage would possibly cowl them.

Physician-approved check #1: Blood panel

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

By holding 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 will also be influenced comparatively rapidly (inside 6 to 12 weeks) by way of life-style adjustments, complement protocols, or medicines. This makes them sensible instruments for monitoring whether or not varied life-style or medical modifications are working.

▶ measure it

For those who’re not already doing so, contemplate having the next blood markers examined yearly. Then, discuss to your well being care skilled about what your numbers imply. They may use the next numbers, alongside together with your blood strain, to calculate a heart problems danger 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 check #2: Bone density

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

Which may be as a result of, like muscle tissues, bones are dwell organs that secrete substances which may be useful 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 tissues to supply ATP to regulating mind neurotransmitters.

Due to these different 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 idea. Most of this analysis has been accomplished on mice.)

Osteocalcin apart, lack of bone density can, in fact, result in fractures, which may improve your danger of loss of life for as much as 10 years after a break.18

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

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

▶ measure it

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

Insurance coverage typically gained’t cowl these scans for folks youthful than 65 until there’s a documented danger of creating osteoporosis. Out of pocket, the typical price is about $300.

Whenever you obtain your DEXA outcomes, you’ll see a T-score that represents how your bone density compares to the typical 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 might be liable to fracture).

Industrial bio age checks

In case you have some cash to burn, you’ll be able to be taught an terrible lot about your physique.

Right here, you’ll discover a fast run-down on a number of the extra high-tech checks you may get and what they’ll inform you.

Nonetheless, earlier than we get into the main points, we need to level out just a few caveats:

▶ Organic age can range over time, and by organ. Somebody could undergo a interval of accelerated ageing—saying, throughout a interval of intense stress—then their charge of ageing could sluggish as they focus extra on restoration. Moreover, organs can age at completely different charges. For instance, somebody with coronary heart illness could have a comparatively older coronary heart than their kidneys. (Not all checks measure particular person organ age, but it surely’s changing into extra widespread.)

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

▶ If an organization pairs your check 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 check #1: DNA methylation

DNA methylation is a organic course of that chemically alters DNA. As a result of the speed of methylation accelerates with ageing, 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 higher perceive somebody’s methylation charge. Scientists developed these checks to assist different scientists examine how varied life-style components, environmental exposures, and medicines have an effect on ageing. They didn’t develop the checks as a manner for the typical particular person to pinpoint their organic age. (Which hasn’t stopped firms from promoting DNA methylation testing kits to the general public.) They price about $300.

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

Industrial check #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 instances a selected cell can divide earlier than dying.

Abnormally quick telomeres are related to a number of genetic illnesses. Because of this, when physicians suspect somebody might need inherited a genetic illness, they’ll order a selected sort of telomere check—the flow-FISH check—to measure the telomere size in all of the cells in a blood pattern.22 23

It’s extra debatable whether or not telomere checks can predict ageing in wholesome folks.

Simply as importantly, the telomere check marketed to the general public, often known as the qPCR telomere check, isn’t utilized in analysis or drugs. These $100 checks are wonderful for those who’re merely curious—simply don’t base well being and health choices in your outcomes.

Industrial check #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 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 ageing.

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

In an observational examine 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 improve in VO2 max was related to a 45-day improve in longevity. The researchers steered VO2 max could 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 ageing physique as a coal mine.

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

Along with elevating your danger for a lot of completely different illnesses, these adjustments may have an effect on VO2 max, which tends to say no 10 p.c per decade beginning round age 30.29 30

Up to now, the one solution 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 remains to be probably the most correct solution to measure V02 max in addition to different key health metrics similar to:

  • Max coronary heart charge, or the very best variety of instances 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 gas to utilizing a mixture of fats and glucose or glycogen (saved glucose) for gas.
  • 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 of get your VO2 max examined for round $150.

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

▶ The 1-mile stroll check

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

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

If that appears like an excessive amount of math, you may also use a free on-line device.

▶ The smartwatch check

Many smartwatches will estimate your VO2 Max for you primarily based on data 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 out of practice 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 developments. For instance, does your VO2 estimate drop after just a few weeks of skipping your common spin class? If that’s the case, that’s good data to have.

▶ The PR check

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

One solution to check this: the 12-minute run check, often known as the Cooper check. (This can be a validated solution to estimate VO2 max—and exhibits a few 90 p.c 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, similar to a treadmill set at a 1 p.c incline or working monitor, for 12 minutes. After 12 minutes, document 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, you may also use a free on-line calculator.

change your organic age

Strive to consider the data you collect about your physique as simply that—data.

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

Simply as importantly, it’s not a everlasting scenario.

  • For those who’re weaker than different folks 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 ageing sooner than your birthdays, contemplate exploring key life-style adjustments which will assist flip the scenario round.

You’ve choices. Nonetheless, most individuals make two large errors in relation to longevity-related life-style adjustments.

Mistake #1: Ignoring evergreen, big-impact methods

It’s the straightforward, boring, “I’ve heard this 1,000,000 instances earlier than” well being practices that, when accomplished persistently, add as much as an extended, 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
  • Shifting your physique recurrently
  • Getting sufficient relaxation and sleep
  • Having fun with neighborhood, time in nature, and different actions that make life significant
  • Maintaining alcohol consumption reasonable
  • Not utilizing tobacco
  • Carrying sunscreen
  • Flossing

And that’s only a partial listing.

Based on hundreds of research, individuals who follow these and different high-impact methods not solely dwell longer, but additionally dwell 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 in relation to large impression well being and longevity methods, take a look at our FREE Longevity Evaluation.)

Nonetheless, in relation to well being, health, and longevity, many individuals pursue choices with minimal impression (at greatest). They attain for the newest, fashionable complement fairly than taking steps to stop smoking, as only one instance.

Right here’s the factor: Large rock methods require adjustments in habits. If day by day bodily exercise have been as simple as popping a capsule, walkers and cyclists would clog up the streets in your neighborhood.

(It’s exactly this cause why so many individuals want the help of an authorized well being coach who has undergone coaching within the science of habits change.)

Mistake #2: Not turning information into motion

The info gathered from biomarker ageing checks can provide you a way of management.

Nonetheless…

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

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

You have 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 habits change, you’re losing your time and money.

Contemplate your biomarker information as a baseline or start line.

Then, use it to evaluate whether or not varied life-style adjustments or medical interventions are shifting you nearer to your objective 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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