Watercolor illustration representing laboratory tests for healthy aging

◈ Healthy Aging Resource

Healthy Aging Lab Tests: Which Tests Really Matter?

By Eddie Khoriaty, BPharm, R.Ph., C.Ph.

If you want to age well, one of the smartest things you can do is understand what is happening inside your body before symptoms develop. Many conditions that become more common with age, including heart disease, diabetes, kidney disease, and metabolic disorders, can begin quietly. Routine laboratory testing may help identify certain risk factors early, giving you and your healthcare provider an opportunity to discuss preventive care, lifestyle changes, or treatment when appropriate.

At the same time, more testing is not always better. Some laboratory tests are supported by decades of research and routinely used in medical care. Others are helpful only for people with certain symptoms or risk factors. Many of the newer tests marketed for “longevity” or “biological age” are still being studied and may not provide information that changes your medical care.

In this guide, I’ll explain which tests form the foundation of routine health monitoring, when additional biomarkers may be worth discussing, and which newer longevity tests should be approached with caution. I’ll also cover useful measures that do not come from a blood sample, including bone density, body composition, grip strength, and cardiovascular fitness.

No single result can tell you how healthy you are or predict how well you will age. Lab values are most useful when they are interpreted alongside your medical history, medications, symptoms, lifestyle, and changes over time.

A pharmacist’s perspective: This guide is meant to help you understand commonly discussed lab tests and prepare thoughtful questions for your healthcare provider. It is not a recommendation to order every test listed. The right tests depend on your age, health history, symptoms, medications, and individual risk factors.

Key Takeaways

  • Start with the basics. Routine tests such as a CBC, metabolic panel, lipid panel, and blood sugar testing provide a useful foundation for monitoring your health.
  • Not every test is appropriate for everyone. Your age, symptoms, medications, medical history, and family history help determine whether additional testing may be useful.
  • Trends often matter more than one result. Following changes over time can reveal patterns that may not be obvious from a single laboratory value.
  • Newer does not always mean better. Some advanced biomarkers and biological age tests are promising, but many are not yet recommended for routine screening.
  • Lab results need context. Your healthcare provider should interpret results alongside your overall health rather than treating one number as a complete picture.

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Start With the Basics: CBC and CMP

Before considering specialized biomarkers or expensive longevity panels, it makes sense to start with the laboratory tests commonly used to evaluate overall health. Two of the most familiar are the Complete Blood Count and Comprehensive Metabolic Panel.

Complete Blood Count

The Complete Blood Count, commonly called a CBC, measures the cells circulating in your blood. This includes red blood cells, white blood cells, platelets, hemoglobin, hematocrit, and other measurements that provide information about the size and characteristics of your blood cells.

A CBC can help identify possible anemia, infection, immune system problems, certain nutritional deficiencies, and disorders affecting the blood or bone marrow. It may also be used to monitor medical conditions or medications that can affect blood cell counts.

An abnormal result does not automatically mean that something is seriously wrong. Hydration, medications, recent illness, and other factors can influence the numbers. Your healthcare provider will look at the pattern of results and determine whether additional testing is needed.

Comprehensive Metabolic Panel

A Comprehensive Metabolic Panel, or CMP, measures 14 substances in the blood. Together, they provide information about several important areas of health, including:

  • Blood glucose
  • Kidney function
  • Liver function
  • Electrolyte and fluid balance
  • Calcium
  • Protein levels

Some of the familiar markers included in a CMP are glucose, sodium, potassium, calcium, creatinine, blood urea nitrogen, albumin, bilirubin, ALT, AST, and alkaline phosphatase.

Because the CMP covers several body systems at once, it can help uncover changes that may not yet be causing noticeable symptoms. It can also help your healthcare provider monitor an existing condition or check whether a medication is affecting your kidneys, liver, or electrolyte balance.

You may sometimes see a Basic Metabolic Panel, or BMP, instead. A BMP measures eight of the same substances but does not include the liver enzymes, bilirubin, albumin, or total protein found in a CMP.

Kidney and Liver Function

The kidneys and liver perform many essential jobs, from filtering waste and regulating fluid balance to processing nutrients and medications. Several markers included in routine bloodwork can help your healthcare provider evaluate how these organs are functioning.

Kidney Function

Two numbers commonly used to assess kidney function are creatinine and estimated glomerular filtration rate, or eGFR.

Creatinine is a waste product produced during normal muscle metabolism. Healthy kidneys remove it from the blood. When kidney function declines, creatinine may rise because it is not being filtered as efficiently.

Creatinine has limitations, however. Muscle mass, diet, age, certain medications, and other factors can affect the result. A person with more muscle may naturally have a higher creatinine level, while an older adult with very little muscle may have a result that appears normal even when kidney function has declined.

eGFR uses creatinine along with factors such as age and sex to estimate how efficiently the kidneys are filtering blood. One unusual result does not necessarily indicate chronic kidney disease. Healthcare providers often learn more by following eGFR over time and considering it alongside other findings.

Another valuable test is the urine albumin-to-creatinine ratio, or uACR. This test checks for small amounts of albumin leaking into the urine. Albumin in the urine may be an early sign of kidney damage, even when creatinine and eGFR have not yet changed significantly. It is especially important for people with diabetes, high blood pressure, cardiovascular disease, or known kidney disease.

Pharmacist’s Tip: Tell your healthcare provider about all medications and supplements you take before interpreting kidney results. Certain products can affect creatinine or kidney function. If you use creatine, you may also find my guide, Does Creatine Hurt Your Kidneys?, helpful.

Liver Function

The liver processes nutrients, produces important proteins, helps regulate blood clotting, and breaks down many medications and other substances. Common liver-related markers include ALT, AST, alkaline phosphatase, bilirubin, and albumin.

ALT and AST are enzymes that may rise when liver cells are irritated or injured. ALT is more closely associated with the liver, while AST is also found in muscle and other tissues. This is why an elevated AST result must be interpreted alongside other laboratory findings.

Alkaline phosphatase can provide information about the liver and bile ducts, although it is also found in bone. Bilirubin is produced as red blood cells break down and is normally processed by the liver. Albumin is a protein made by the liver and may help provide information about its ability to perform certain functions.

Abnormal liver results can have many possible causes, including fatty liver disease, alcohol use, medications, supplements, viral infections, bile duct problems, and even strenuous exercise. These tests can identify a possible concern, but they usually cannot determine the cause on their own.

Blood Sugar and Insulin

Changes in blood sugar regulation can develop gradually, often before noticeable symptoms appear. Fasting glucose and hemoglobin A1c are commonly used to screen for prediabetes and diabetes. Fasting insulin may provide additional information in selected situations.

A Snapshot

Fasting Blood Glucose

This test measures your blood sugar after you have not eaten for at least eight hours. It provides a useful snapshot, but it may not reveal blood sugar spikes that occur after meals.

A Longer View

Hemoglobin A1c

The A1c test estimates your average blood sugar over approximately the previous two to three months. It provides a broader view than one fasting measurement and usually does not require fasting.

Additional Insight

Fasting Insulin

This test measures how much insulin your body is producing while fasting. Higher levels may suggest that the body is working harder to keep blood sugar controlled, but fasting insulin is not routinely used to diagnose prediabetes or diabetes.

Insulin resistance can develop when the body's cells stop responding efficiently to insulin. The pancreas may compensate by producing more insulin, sometimes allowing blood glucose to remain within the expected range for a period of time. This is why fasting insulin has attracted attention in preventive and longevity medicine.

However, fasting insulin results can vary, and there is no single cutoff used to diagnose insulin resistance in every patient. Healthcare providers generally rely on established glucose tests, medical history, and individual risk factors when deciding whether further evaluation is appropriate.

Maintaining healthy blood sugar supports the heart, kidneys, nerves, eyes, brain, and overall metabolic health. Visit our Metabolic Health Hub for more pharmacist-written resources on blood sugar and metabolism.

Pharmacist's Tip: Illness, stress, sleep, recent exercise, and certain medications can affect blood sugar results. Do not make major changes based on one reading. Ask your healthcare provider to interpret the result in the context of your health history and previous tests.

Cholesterol and Cardiovascular Risk

Most people are familiar with total cholesterol, LDL cholesterol, HDL cholesterol, and triglycerides. These measurements remain important, but they do not always tell the whole story.

Some people develop cardiovascular disease even though their standard cholesterol results do not appear especially concerning. Additional markers may help provide a clearer picture of risk, particularly when someone has diabetes, high triglycerides, metabolic syndrome, kidney disease, or a family history of premature heart disease.

If you need a refresher on the standard lipid panel, begin with my guide to understanding cholesterol and what your numbers mean.

Apolipoprotein B

Apolipoprotein B, usually called ApoB, provides an estimate of the number of particles in the blood that can contribute to plaque buildup in the arteries.

Each potentially artery-clogging particle, including LDL, VLDL, IDL, and lipoprotein(a), carries one ApoB protein. A standard LDL result measures the amount of cholesterol being carried inside LDL particles. ApoB helps estimate how many of these potentially harmful particles are circulating.

This distinction can matter because two people with similar LDL cholesterol levels may have different numbers of particles. ApoB testing may be especially helpful for people with high triglycerides, diabetes, obesity, metabolic syndrome, or results that do not seem to provide a consistent picture of cardiovascular risk.

Lipoprotein(a)

Lipoprotein(a), abbreviated Lp(a), is a cholesterol-carrying particle that is largely determined by genetics. An elevated level is associated with a higher risk of heart attack, stroke, peripheral artery disease, and aortic valve stenosis.

Unlike many other cardiovascular risk factors, Lp(a) is not significantly lowered through diet and exercise alone. Because the level usually remains relatively stable throughout life, current cardiovascular guidelines recommend that every adult have Lp(a) measured at least once.

Testing is particularly important when there is a personal or family history of premature cardiovascular disease or unexpectedly high cholesterol. Knowing that Lp(a) is elevated may influence how aggressively your healthcare provider addresses other risk factors, including LDL cholesterol, blood pressure, smoking, and blood sugar.

High-Sensitivity C-Reactive Protein

High-sensitivity C-reactive protein, or hs-CRP, measures low levels of inflammation in the body. It may provide additional information about cardiovascular risk, particularly when someone’s risk is otherwise uncertain.

However, hs-CRP is not specific to heart disease. Levels can temporarily rise because of an infection, dental problem, arthritis flare, recent injury, or surgery. An elevated result may need to be repeated when you are feeling well before it can be meaningfully interpreted.

These additional tests do not replace the standard lipid panel. They add context and may help your healthcare provider develop a more complete assessment of your cardiovascular risk.

Continue exploring blood pressure, cholesterol, sodium, exercise, and other cardiovascular topics in the GlowPure Heart Health Hub.

Thyroid Function

The thyroid helps regulate metabolism, energy production, body temperature, heart rate, digestion, and many other functions. Thyroid problems become more common with age, and symptoms can be easy to mistake for normal aging.

An underactive or overactive thyroid may contribute to fatigue, weight changes, muscle weakness, mood changes, memory difficulties, changes in heart rate, high cholesterol, or constipation. However, these symptoms can have many possible causes, so blood testing is needed to determine whether the thyroid may be involved.

TSH

Thyroid-stimulating hormone, or TSH, is usually the first test used to evaluate thyroid function. TSH is produced by the pituitary gland and signals the thyroid to make thyroid hormone.

In most cases, a high TSH may suggest an underactive thyroid, while a low TSH may suggest an overactive thyroid. The result must still be interpreted alongside symptoms, medications, medical history, and other thyroid tests.

Free T4 and Free T3

Free T4 measures the main hormone produced by the thyroid gland. It is often checked when the TSH result is abnormal or when a healthcare provider needs additional information.

Free T3 testing is more useful in certain situations, particularly when an overactive thyroid is suspected. It is not routinely needed for every thyroid evaluation and is generally less helpful when evaluating an underactive thyroid.

Pharmacist’s Tip: Biotin, an ingredient commonly found in hair, skin, and nail supplements, can interfere with some thyroid laboratory tests and make the results appear abnormal. Tell your healthcare provider about any biotin-containing supplements before testing and ask whether they should be temporarily stopped.

Vitamins, Minerals, and Iron Stores

Nutrient testing can be useful when a deficiency is suspected or when age, diet, medications, or a medical condition increases the risk. These tests are not automatically necessary for everyone.

Vitamin D

Vitamin D supports bone strength, muscle function, and normal immune function. Deficiency is more common among older adults, people with limited sun exposure, and those with certain conditions that affect nutrient absorption.

The usual blood test measures 25-hydroxyvitamin D. Routine testing is not recommended for every healthy adult, but it may be appropriate when deficiency or a bone-related condition is suspected. Testing can also help guide supplementation because excessive vitamin D can be harmful.

Learn more about vitamin D3 and K2. If your healthcare provider recommends supplementation, you can also learn about GILA Fortify Vitamin D3 + K2.

Vitamin B12

Vitamin B12 is needed for healthy nerves, red blood cell formation, DNA production, and brain function. Deficiency may cause fatigue, numbness, tingling, balance problems, or memory changes.

The risk of deficiency can increase with age because the body may not absorb B12 as efficiently. Long-term use of metformin or certain acid-reducing medications may also affect B12 levels.

Ferritin

Ferritin reflects the amount of iron stored in the body. A low ferritin level may reveal iron deficiency before anemia becomes apparent on a CBC.

A high ferritin result does not always mean that someone has too much iron. Ferritin may also rise with inflammation, infection, liver disease, or certain metabolic conditions. It is usually interpreted alongside other iron studies and the CBC.

Magnesium

Magnesium supports muscle and nerve function, heart rhythm, blood pressure regulation, bone health, and blood sugar control.

A standard serum magnesium test measures only the small amount circulating in the blood. The body tightly regulates this level, so a normal result may not always reflect total magnesium stores. Your healthcare provider will also consider symptoms, diet, medications, and kidney function.

Read my guide to understanding elemental magnesium. If a magnesium supplement is appropriate for you, learn about GILA Rest Magnesium Glycinate.

Homocysteine

Homocysteine is an amino acid produced during normal metabolism. Elevated levels may occur when the body does not have enough vitamin B12, folate, or vitamin B6. Kidney disease, certain medications, genetics, and other health conditions can also affect the result.

Higher homocysteine levels have been associated with cardiovascular disease, stroke, and cognitive decline. However, lowering homocysteine with B vitamin supplements has not consistently been shown to prevent heart attacks or other cardiovascular events.

For that reason, homocysteine is not generally used as a routine screening test for every healthy adult. It may provide useful information in selected situations, particularly when a vitamin B12 or folate deficiency is suspected or when a healthcare provider is investigating an unusually elevated result.

Pharmacist's Tip: Do not assume that more is better when a vitamin or mineral level is low. The appropriate supplement and amount depend on the cause of the deficiency, your medications, kidney function, and other health factors.

Hormone Testing: Is It Right for Everyone?

Hormones influence muscle mass, bone health, metabolism, mood, sexual health, and energy. This has made hormone panels popular in longevity medicine, but testing every hormone simply because someone is getting older is rarely helpful.

Hormone testing is usually most valuable when a person has symptoms, a medical condition, or a treatment that gives the healthcare provider a specific reason to investigate.

Testosterone

In men, testosterone levels often decline gradually with age. Low testosterone may contribute to reduced muscle mass, decreased strength, low libido, fatigue, mood changes, or reduced bone density. However, these symptoms can also have many other causes.

A diagnosis should not be based on symptoms or one laboratory result alone. Testosterone is generally measured in the early morning, when levels tend to be highest. If the result is low, the test is usually repeated on a different morning before a diagnosis or treatment decision is made.

Testosterone treatment is not an anti-aging therapy for every older man. The potential benefits and risks should be evaluated individually.

Estrogen

Estrogen levels change considerably during perimenopause and menopause. For most women experiencing menopause at the expected age, blood testing is not routinely needed to confirm what is happening.

Estrogen and other hormone tests may be appropriate when symptoms are unusual, menstrual changes occur earlier than expected, the diagnosis is uncertain, or another hormonal condition is suspected.

Hormone results can fluctuate and may be affected by medications, supplements, illness, and the timing of the test. The number is only useful when interpreted in the context of the person being tested.

Healthy Aging Beyond Blood Tests

Blood tests can provide valuable information, but they cannot show how strong your bones are or how much of your body weight comes from muscle rather than fat. These measurements become increasingly important as we age because they are closely connected to mobility, independence, and fracture risk.

Bone Density

Osteoporosis can develop silently for years. For many people, the first noticeable sign is a fracture.

A Dual-Energy X-ray Absorptiometry scan, usually called a DEXA or DXA scan, measures bone mineral density and is the standard test used to diagnose osteoporosis. The scan is painless, takes only a few minutes, and exposes you to a very small amount of radiation.

Current recommendations support bone density screening for women age 65 and older. Screening may begin earlier for postmenopausal women who have an increased risk of osteoporosis. A healthcare provider may also recommend testing based on factors such as a previous fracture, low body weight, long-term corticosteroid use, family history, or certain medical conditions.

Screening recommendations for men are less uniform, so the decision is generally based on age and individual risk factors.

Body Composition

A bathroom scale tells you how much you weigh, but it cannot tell you what that weight consists of. Two people with the same weight may have very different amounts of muscle, body fat, visceral fat, and bone mass.

This distinction matters because losing muscle while gaining fat may not cause a dramatic change on the scale. It can still affect strength, balance, blood sugar regulation, and the ability to remain active.

Body composition may be estimated using DEXA scans, bioelectrical impedance devices, air displacement testing, or skinfold measurements. Each method has limitations, and results from different devices are not always directly comparable.

When tracking body composition, it is often more helpful to use the same method under similar conditions and watch the trend over time.

Preserving muscle is one of the most important parts of maintaining function as we age. Learn more in my guide to sarcopenia and age-related muscle loss.

Healthy aging lab tests vs. functional tests

Functional Measures: How Well Is Your Body Working?

Some of the most useful signs of healthy aging never appear on a laboratory report. Strength, walking speed, balance, and cardiovascular fitness can reveal how well several body systems are working together.

These measurements are not pass-or-fail tests. They are most helpful when used to identify changes over time or areas where additional exercise, evaluation, or support may be needed.

Grip Strength

Grip strength is measured with a small handheld device called a dynamometer. Although the test focuses on the hand, it can provide a general indication of overall muscle strength and physical function.

Lower grip strength has been associated with frailty, falls, disability, hospitalization, and difficulty performing everyday activities. Grip strength may also decline when someone becomes less active, loses muscle, or is recovering from an illness.

One result should not be viewed as a prediction of how long you will live. Age, sex, hand injuries, arthritis, and testing technique can all affect the measurement. The greatest value may come from following changes over time and addressing a noticeable decline.

Walking Speed

Walking requires coordination among the muscles, joints, heart, lungs, brain, balance system, and nerves. This is why walking speed can provide useful information about overall health and mobility.

A slower pace may be associated with weakness, balance problems, pain, neurological conditions, cardiovascular limitations, or fear of falling. A meaningful change in someone’s usual walking speed may be more important than comparing that person with a general chart.

Healthcare professionals may measure walking speed over a set distance as part of a mobility, rehabilitation, or fall-risk assessment.

VO₂ Max

VO₂ max measures the body’s ability to take in, transport, and use oxygen during exercise. It is one of the most useful measures of cardiorespiratory fitness.

Formal testing is usually performed on a treadmill or stationary bicycle while breathing through specialized equipment. Many fitness watches also estimate VO₂ max using heart rate and activity data. These estimates are not the same as a clinical test, but they may still be useful for following general trends.

Cardiorespiratory fitness can often improve with regular aerobic activity, even later in life. Learn more in my guide to how much exercise your heart needs.

The goal is not to achieve an elite score. It is to maintain enough strength, mobility, balance, and endurance to continue doing the things that matter to you.

Wearables and Continuous Monitoring

Technology now allows us to monitor certain health measurements throughout the day instead of relying only on occasional office visits or laboratory tests. These devices can reveal patterns, encourage healthier habits, and provide useful information to discuss with a healthcare provider.

They also have limitations. Consumer devices can produce inaccurate readings, false alerts, and more data than most people know how to interpret.

Continuous Glucose Monitors

Continuous glucose monitors, or CGMs, use a small sensor placed under the skin to estimate glucose levels throughout the day and night. They are especially valuable for many people with diabetes because they show how glucose changes in response to meals, medication, exercise, sleep, and stress.

CGMs have also become popular among people who do not have diabetes. They can make it easier to see how portion size, food combinations, physical activity, and sleep affect individual glucose patterns. However, research has not yet established that routine CGM use improves long-term health outcomes for every healthy adult.

On a personal note, I wear a CGM even though I do not have diabetes. I have found it fascinating and, at times, surprising. Foods marketed as low sugar or low carbohydrate do not always produce the response I expect, and portion size can make a major difference.

One of my clearest lessons came from eating a large serving of french fries. My glucose rose higher and stayed elevated longer than I expected. A smaller portion, especially when eaten with protein, produced a very different pattern. The experience helped me better understand my own responses, but it does not mean that everyone needs a CGM or that one glucose spike is automatically dangerous.

Smartwatches and Fitness Trackers

Modern watches and fitness trackers may monitor heart rate, physical activity, sleep, oxygen saturation, heart rhythm, and heart rate variability. Some can also estimate VO₂ max or notify the wearer about a possible irregular rhythm.

The greatest value usually comes from identifying patterns over time. A watch may show that your resting heart rate is changing, your activity has declined, or your sleep schedule has become less consistent.

These devices are not substitutes for medical evaluation. A normal reading cannot rule out a health problem, and an alert does not automatically mean that a medical condition is present. Repeated or concerning findings should be discussed with a qualified healthcare professional.

Advanced Biomarkers: When They May Help

Some tests can provide additional information when routine results leave an important question unanswered. That does not mean they belong in every annual blood panel. Their value depends on your symptoms, medical history, risk factors, and whether the result is likely to influence your care.

Sometimes Useful

Uric Acid

Uric acid is produced when the body breaks down substances called purines. Testing is commonly used when gout or certain kidney problems are suspected.

Higher levels have also been associated with high blood pressure, metabolic syndrome, kidney disease, and cardiovascular disease. Researchers are still determining whether uric acid directly contributes to these conditions or sometimes reflects other metabolic problems.

Sometimes Useful

Omega-3 Index

The Omega-3 Index measures the percentage of the omega-3 fatty acids EPA and DHA in red blood cell membranes. It can provide information about longer-term omega-3 status that may not be obvious from a dietary questionnaire.

It is not recommended as a routine test for everyone. It may be useful in selected situations when a healthcare provider is evaluating diet or supplementation.

Additional Context

Triglyceride-to-HDL Ratio

This ratio compares two values already included in a standard lipid panel. A higher ratio has been associated with insulin resistance and metabolic risk in some populations.

The ratio does not replace established cholesterol measurements, ApoB testing, blood sugar testing, or a complete cardiovascular risk assessment.

Sometimes Useful

Cystatin C

Cystatin C is another marker that can be used to estimate kidney filtration. Unlike creatinine, it is less affected by muscle mass.

A healthcare provider may use cystatin C when a creatinine-based eGFR may be less accurate, such as in someone with unusually high or low muscle mass, or when a more precise assessment of kidney function is needed.

Specialized Use

High-Sensitivity Troponin

Troponin is best known as a test used when a heart attack is suspected. High-sensitivity versions can detect very small amounts of heart muscle injury.

Researchers continue to study whether low-level elevations may help predict future cardiovascular risk. It is not currently a routine longevity screening test for healthy adults.

Specialized Use

NT-proBNP

NT-proBNP is released when the heart is under increased pressure or stress. It is commonly used when heart failure is suspected or monitored.

The result can be affected by age, kidney function, heart rhythm, and other medical conditions. It is generally ordered to answer a specific clinical question rather than as part of routine healthy-aging screening.

Specialized Use

Advanced Lipoprotein Testing

Some laboratories offer detailed measurements of LDL particle number, particle size, and other lipoprotein characteristics. These tests may provide additional information in selected patients whose standard cholesterol results do not match their overall risk.

For many people, however, ApoB provides much of the clinically useful particle information at a lower cost and with easier interpretation. More detailed testing does not automatically lead to better decisions.

Pharmacist's Take: An advanced test is worthwhile only when the result helps answer a meaningful question or changes what you and your healthcare provider do next. A longer laboratory report is not necessarily a better one.

Biological Age and Experimental Longevity Tests

Few areas of longevity medicine have attracted more attention than tests that promise to reveal your “true” biological age. Unlike chronological age, which is simply the number of years you have lived, biological age attempts to estimate how quickly your body is aging.

The idea is fascinating, and the science behind it is advancing rapidly. However, these tests are not yet as straightforward or clinically useful as many advertisements suggest.

Oxidative Stress Biomarkers

Oxidative stress occurs when the production of unstable molecules called free radicals exceeds the body’s ability to neutralize them. Because oxidative stress may contribute to cellular damage and aging, researchers have studied markers such as:

  • F2-isoprostanes
  • Oxidized LDL
  • 8-hydroxy-2'-deoxyguanosine, or 8-OHdG

These markers can be valuable in research, but they are not commonly used in routine preventive care. Results may vary based on the testing method, recent illness, diet, exercise, environmental exposures, and other factors.

More importantly, it is not always clear what someone should do differently based on one of these results. A test has limited practical value if it does not lead to a reliable treatment or meaningful change in medical care.

Epigenetic Clocks

Some biological age tests examine DNA methylation, which refers to chemical tags that affect how genes are expressed. Researchers have developed mathematical models, often called epigenetic clocks, that use these patterns to estimate biological age.

Other approaches may analyze proteins, metabolites, immune system changes, or combinations of laboratory and lifestyle data.

These technologies may eventually help researchers understand why people age differently or measure how certain interventions affect the aging process. For now, they have important limitations:

  • Different companies may produce different biological age estimates.
  • Testing methods and algorithms continue to change.
  • A biological age result is not a diagnosis.
  • Scientists have not established one universally accepted test.
  • It is often unclear whether changing the score improves health outcomes.

A result that says you are biologically younger than your chronological age may feel reassuring. A result that says you are older may create unnecessary worry. Neither result should replace established screening, medical care, or attention to the risk factors we already know how to address.

Looking Ahead

Researchers are also using artificial intelligence to study combinations of laboratory values, medical images, genetics, wearable data, and lifestyle information. These tools may eventually help identify health risks earlier or personalize preventive care.

That potential is exciting, but the same rule still applies: new technology should support sound medical judgment, not replace it.

For most people, monitoring blood pressure, cholesterol, blood sugar, kidney function, strength, activity, sleep, and other established measures currently provides more useful information than purchasing an expensive biological age panel.

When More Testing Isn't Better

It can be tempting to believe that ordering more tests will automatically lead to better health. In reality, every test should have a clear purpose and a plan for what happens after the result comes back.

More Testing Can Lead To

  • False-positive results
    A result may appear abnormal even when no meaningful health problem is present.
  • Unnecessary worry
    An unexpected number can create anxiety before its significance is understood.
  • Additional procedures
    One questionable result may lead to repeat testing, imaging, specialist visits, or invasive follow-up.
  • Added expense
    Specialized testing can be costly and may not be covered by insurance.

Before Ordering a Test, Ask

  • What question are we trying to answer?
    A useful test begins with a specific medical reason.
  • Could the result change what we do next?
    Testing has more value when it can guide prevention, treatment, or monitoring.
  • Who will interpret the result?
    Laboratory values need to be considered alongside symptoms, medications, history, and other findings.

Pharmacist's Take: The goal is not to collect the largest number of results. The goal is to choose tests that provide useful information and help you make better decisions with your healthcare provider.

Turning Test Results Into a Healthy Aging Roadmap

Lab testing is most useful when it helps you make better decisions. The goal is not to order every available test or chase a perfect number. It is to identify meaningful risks, guide conversations with your healthcare provider, and see whether your health is moving in the right direction.

Build a Baseline

A baseline gives you something to compare with future results. It is often helpful to establish one while you are feeling well, rather than waiting until symptoms develop.

The right baseline will be different for everyone. Your age, medical history, family history, medications, symptoms, and risk factors should all help determine which tests make sense.

Look for Trends, Not Perfect Numbers

One lab result is a snapshot. A pattern over time often tells us much more.

Small changes can occur because of hydration, illness, recent exercise, medications, supplements, or even the time of day. Reference ranges may also vary between laboratories. When possible, using the same laboratory can make your results easier to compare.

Instead of focusing only on whether a result is marked “high” or “low,” ask:

  • Has this number changed over time?
  • Could a medication, supplement, illness, or lifestyle change explain it?
  • Does it fit with my other results and how I feel?
  • Would acting on it improve my health or change my care?

An abnormal result does not always mean something is wrong. Likewise, a result within the reference range does not automatically mean everything is fine. Results need context.

Be Cautious With Direct-to-Consumer Testing

At-home and direct-to-consumer testing can make health information more accessible. It can also produce results that are difficult to interpret without the rest of your medical picture.

Before ordering a test, know what question you are trying to answer. Consider what you would do if the result were high, low, or unexpected. If the answer would not change anything, the test may create more worry than useful information.

Bring your results, along with a current list of medications and supplements, to your next appointment. Your healthcare provider can help you decide which findings deserve follow-up and which may simply need to be monitored.

The Foundations Still Matter Most

Testing can help identify risks and track progress, but no lab panel can replace the everyday habits that support healthy aging. In many cases, the most useful result is one that points you toward a practical change.

Stay Physically Active

A well-rounded routine should include aerobic exercise, strength training, balance work, and regular movement throughout the day. Strength training becomes especially important with age because it helps preserve muscle, bone strength, mobility, and independence.

Creatine monohydrate is one of the better-studied supplements for supporting muscle strength and physical function when combined with resistance training. Learn more about the science behind creatine monohydrate, or explore GILA Sustain Creatine Monohydrate.

Learn how much exercise your heart needs →

Eat for Long-Term Health

Build most meals around vegetables, fruit, beans, whole grains, healthy fats, and good sources of protein. Protein deserves particular attention as we age because it helps maintain muscle and supports recovery.

You do not need a perfect diet. A consistent eating pattern built around minimally processed foods will usually matter more than any single “superfood.”

Protect Your Sleep

Sleep supports memory, immune function, blood sugar regulation, appetite, and cardiovascular health. If you regularly have trouble sleeping, snore loudly, wake up gasping, or remain tired during the day, talk with your healthcare provider rather than assuming poor sleep is simply part of aging.

Read how much sleep older adults really need →

Maintain Social Connections

Healthy aging is not only physical. Regular contact with friends, family, neighbors, or community groups supports emotional health and may help protect cognitive function. Loneliness and social isolation deserve the same attention as other health risks.

Avoid Tobacco and Limit Alcohol

Avoiding tobacco is one of the most important steps you can take for your long-term health. If you drink alcohol, consider how it may affect your sleep, blood pressure, medications, balance, and risk of falls.

Keep Preventive Care Up to Date

Routine medical visits, vaccinations, cancer screenings, vision and hearing checks, dental care, and medication reviews are all part of a healthy aging plan. Lab testing is only one piece of the picture.

The basics may not sound as exciting as a new biological-age test, but they have much stronger evidence behind them. Use testing to guide these habits, not distract you from them.

Questions to Ask Your Healthcare Provider

Your annual wellness visit is a good opportunity to review your results and make sure your testing is based on your individual needs.

Consider asking:

  • Which laboratory tests are appropriate for me this year?
  • Have any of my results changed meaningfully over time?
  • Could my medications or supplements be affecting these results?
  • Would any additional testing change my treatment or next steps?
  • Should we also evaluate bone health, muscle strength, balance, or mobility?

Open communication helps keep testing focused and useful. It also reduces the chance of ordering tests that create more confusion than answers.

A Few Final Thoughts

I hope you found this guide as useful to read as it was for me to put together. Reviewing the research and revisiting some of these tests was helpful for me, too.

There is no single laboratory test that can guarantee a long, healthy life. Think of lab testing as the dashboard in your car. The numbers can alert you to a potential problem, but they do not tell the entire story or fix the problem for you.

Use laboratory testing as a tool, not as a report card. Trends over time are often more meaningful than one isolated result, and every result should be interpreted within the context of your health history, medications, symptoms, and goals.

Healthy aging is built through informed decisions, preventive care, and the choices you make every day. Staying active, eating well, protecting your sleep, maintaining social connections, and keeping up with appropriate healthcare can have a meaningful effect on how you feel in the years ahead.

Let’s keep learning, asking good questions, and navigating those years together.

Eddie Khoriaty, BPharm, R.Ph., C.Ph.

ABOUT THE AUTHOR

Eddie Khoriaty, BPharm, R.Ph., C.Ph.

Eddie is a licensed pharmacist with more than 30 years of experience and active licenses in more than 30 states. His background includes hospital, retail, clinical, and veterinary pharmacy. He writes GlowPure's educational health guides to help make complex health topics easier to understand.

Frequently Asked Questions

Which blood tests are most important for healthy aging?

There is no single healthy aging panel that everyone needs. Common starting points may include a CBC, comprehensive metabolic panel, lipid panel, hemoglobin A1c, and tests that assess kidney and liver function.

Beyond that, testing should be based on your age, symptoms, medications, medical history, family history, and personal risk factors. More testing is not necessarily better.

How often should healthy aging lab tests be repeated?

It depends on the test and why it was ordered.

Some routine tests may be checked during an annual visit, while others are repeated more or less often based on previous results, medications, or health conditions. Lipoprotein(a), for example, may only need to be measured once for many adults because it is largely determined by genetics and usually remains fairly stable.

Your healthcare provider can help determine a schedule that makes sense for you.

Do I need to fast before these blood tests?

Not always. Many common blood tests can be performed without fasting, and a standard cholesterol panel does not necessarily require it in every situation.

Fasting may be requested for tests such as fasting glucose, fasting insulin, or certain triglyceride measurements. Instructions can also vary by laboratory and by the reason the test was ordered. Ask before your appointment rather than assuming.

Water is usually permitted and can make the blood draw easier, but confirm the instructions you were given.

Should everyone have ApoB and lipoprotein(a) tested?

Current cholesterol guidance recommends that adults have lipoprotein(a), or Lp(a), measured at least once. An elevated level is usually inherited and may reveal cardiovascular risk that is not obvious from a standard cholesterol panel.

ApoB provides an estimate of the number of cholesterol-carrying particles that can contribute to plaque formation. It may be especially helpful when triglycerides are elevated, diabetes or metabolic syndrome is present, or the standard lipid panel does not seem to tell the whole story.

These tests still need to be interpreted alongside your other risk factors.

Can normal lab results still miss health problems?

Yes. A result within the reference range does not guarantee that everything is fine, just as a result outside the range does not automatically mean that you have a disease.

Reference ranges are based on results from groups of people and may vary between laboratories. Symptoms, changes over time, medications, hydration, recent exercise, and other test results all provide important context.

This is one reason I prefer looking at patterns rather than becoming overly focused on one number.

Are biological age tests accurate?

Biological age testing is interesting, but it is not yet the same as a validated medical diagnosis. Different companies may use different samples, biomarkers, and calculations, so the same person can receive different biological age estimates.

These tests may eventually become more useful for tracking health or evaluating interventions. For now, I would view the result as an additional piece of information, not a prediction of how long you will live.

Can medications or supplements affect lab results?

Absolutely. Prescription medications, over-the-counter products, vitamins, supplements, recent exercise, illness, dehydration, and even the time of day can influence certain results.

Biotin deserves special attention because it can interfere with some thyroid and other laboratory tests. Tell your healthcare provider and the laboratory about everything you take. Do not stop a prescribed medication unless the clinician who ordered the test tells you to do so.

Are direct-to-consumer lab tests worth it?

They can be convenient and may help people take a more active role in their health. The problem is that ordering the test is often much easier than interpreting the result.

Before buying a test, ask what question it is supposed to answer and whether the result would change anything you do. You should also have a plan for reviewing abnormal or confusing findings with a qualified healthcare professional.

A test is most valuable when it leads to a useful decision.

References 

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Medical Disclaimer

The information provided in this article is intended for educational purposes only and should not be considered medical advice. It is not intended to diagnose, treat, cure, or prevent any disease, or to replace the advice of your physician or other qualified healthcare provider.

Always consult your healthcare provider before making changes to your diet, exercise routine, medications, or supplement regimen, especially if you have a medical condition, are pregnant or nursing, or take prescription medications.

Individual health needs vary, and the information presented may not be appropriate for every person.