Top 10 Anti-Aging Blood Tests for Proactive Health Monitoring in 2025

The science of longevity has advanced more in the past decade than in the previous half-century. What was once considered the inevitable decline of aging is now understood as a series of measurable biological processes that can be tracked, managed, and even slowed through targeted intervention. At the heart of this longevity revolution is biomarker testing — the ability to measure specific substances in your blood that reflect how your body is aging at the cellular level. In 2025, anti-aging blood tests have moved from the realm of boutique longevity clinics into mainstream health monitoring, available to anyone through at-home testing services like Personalabs. This guide explores the ten most important anti-aging blood tests that forward-thinking individuals are using to optimize their healthspan and live longer, healthier lives.

Table of Contents

1. 1. DHEA-S (Dehydroepiandrosterone Sulfate)
2. 2. Insulin-like Growth Factor 1 (IGF-1)
3. 3. Hemoglobin A1c (HbA1c) & Fasting Insulin
4. 4. High-Sensitivity C-Reactive Protein (hs-CRP)
5. 5. Homocysteine
6. 6. Thyroid Panel (TSH, Free T3, Free T4)
7. 7. Vitamin D (25-Hydroxy Vitamin D)
8. 8. Testosterone (Total & Free) & Estrogen
9. 9. NT-proBNP (Natriuretic Peptide)
10. 10. GGT (Gamma-Glutamyl Transferase) & Liver Health

1. DHEA-S (Dehydroepiandrosterone Sulfate)

DHEA-S is one of the most abundant circulating hormones in the human body, yet its profound anti-aging significance has only become widely appreciated in recent years. DHEA-S is produced primarily by the adrenal glands and serves as the raw material from which the body synthesizes both testosterone and estrogen. It is often called the “youth hormone” because levels peak in your mid-20s and then decline steadily — by the time you reach age 70, DHEA-S levels may be only 10–20% of what they were at their peak. This hormonal decline has been linked to many of the physical and mental changes we associate with aging, including decreased energy, loss of muscle mass, reduced cognitive function, and diminished immune response.

Research published in peer-reviewed journals has consistently shown associations between lower DHEA-S levels and increased risk of cardiovascular disease, certain cancers, cognitive decline, and all-cause mortality. Conversely, individuals who maintain higher DHEA-S levels into older age tend to exhibit better physical performance, healthier body composition, and improved metabolic markers. While supplementing with DHEA directly should only be done under medical supervision (due to potential hormonal side effects and health risks), knowing your DHEA-S level gives you a clear picture of where you stand in the aging hormonal landscape. If your levels are significantly lower than expected for your age, that knowledge can prompt lifestyle and dietary interventions — such as stress reduction, regular resistance training, adequate sleep, and targeted nutrition — that naturally support adrenal function and hormone balance. Personalabs offers DHEA-S testing as part of its hormone and longevity panels, making it accessible for anyone wanting to track this critical anti-aging marker.

2. Insulin-like Growth Factor 1 (IGF-1)

Insulin-like Growth Factor 1, commonly abbreviated IGF-1, is a hormone that is structurally very similar to insulin and plays a central role in growth, development, and cellular repair throughout the body. IGF-1 is produced primarily in the liver in response to growth hormone (GH) secreted by the pituitary gland. Together, the GH/IGF-1 axis is responsible for tissue growth, muscle and bone development, nerve myelination, and cellular regeneration. In children and adolescents, IGF-1 levels are naturally high, driving the growth spurt of puberty. In adults, IGF-1 remains important for maintaining muscle mass, bone density, brain function, and the repair of damaged tissues.

From an anti-aging perspective, IGF-1 is a double-edged sword. While optimal IGF-1 levels are necessary for healthy tissue maintenance and repair, chronically elevated IGF-1 has been associated with increased risk of certain cancers, accelerated aging of tissues, and shortened lifespan in some animal models. On the other hand, excessively low IGF-1 is linked to frailty, muscle wasting, poor wound healing, and cognitive decline. The goal in longevity-focused health monitoring is to keep IGF-1 in the optimal range — high enough to support tissue repair and maintenance, but not so high as to promote pathological cellular growth. Many longevity researchers believe that maintaining IGF-1 in the mid-range of the reference interval (rather than at the high end) is associated with better outcomes. Regular IGF-1 testing helps you track how lifestyle interventions such as resistance training, protein intake, sleep quality, and stress management affect this critical growth factor over time.

3. Hemoglobin A1c (HbA1c) & Fasting Insulin

If there is one metabolic driver of aging that stands above all others in the scientific literature, it is insulin resistance. When cells become less responsive to insulin — the hormone that helps glucose enter cells — the resulting chronically elevated blood sugar and insulin levels cause damage to blood vessels, nerves, organs, and tissues throughout the body. This process, often called “dying of old age,” is now understood to be largely a disease of dysregulated glucose and insulin metabolism. Testing both your HbA1c (which reflects average blood sugar over two to three months) and your fasting insulin level provides the most complete picture of your metabolic age and insulin sensitivity.

HbA1c is a marker of glycation — the process by which excess glucose in the bloodstream attaches to proteins, forming harmful compounds called Advanced Glycation End-products (AGEs). AGEs accelerate aging by damaging collagen in skin (causing wrinkles), lining of blood vessels (promoting atherosclerosis), brain tissue (contributing to cognitive decline), and the lenses of eyes (promoting cataracts). Fasting insulin, meanwhile, is an early warning signal that often becomes abnormal years before fasting blood glucose rises. By tracking both markers, you can catch metabolic dysfunction at its earliest, most reversible stage. Research from organizations like the American Diabetes Association confirms that up to 50% of insulin resistance cases could be prevented or reversed through diet, exercise, and weight management — if caught early enough. Using an at-home test from Personalabs to monitor HbA1c and fasting insulin annually gives you the data you need to make targeted, evidence-based lifestyle choices that directly slow metabolic aging.

4. High-Sensitivity C-Reactive Protein (hs-CRP)

Chronic low-grade inflammation — often called “inflammaging” by longevity researchers — is now recognized as a primary driver of virtually every age-related disease, from atherosclerosis and type 2 diabetes to Alzheimer’s disease and sarcopenia (age-related muscle loss). The high-sensitivity C-reactive protein (hs-CRP) test is the gold standard clinical measure of systemic inflammation levels. Unlike standard CRP tests, which are designed to detect markedly elevated inflammation during acute illness, hs-CRP is sensitive enough to detect the subtle, chronically elevated inflammation that characterizes the aging process and predicts future cardiovascular events.

Studies have consistently demonstrated that individuals with elevated hs-CRP have significantly higher risks of heart attack, stroke, type 2 diabetes, and all-cause mortality. The good news is that hs-CRP is highly responsive to lifestyle interventions — regular aerobic exercise, Mediterranean-style diet, smoking cessation, weight loss, and stress management all reliably lower hs-CRP levels. This makes it one of the most actionable anti-aging markers you can track. The American Heart Association categorizes hs-CRP risk as follows: less than 1.0 mg/L is low risk, 1.0 to 3.0 mg/L is average risk, and above 3.0 mg/L is high risk. If your level falls in the high-risk category, that should be a call to action to implement anti-inflammatory lifestyle changes and work with your healthcare provider to identify potential sources of chronic inflammation (such as untreated gum disease, gut dysbiosis, or chronic infections). Personalabs includes hs-CRP in many of its comprehensive health panels, making annual inflammation monitoring easy and accessible.

5. Homocysteine

Homocysteine is an amino acid that is produced naturally when the body metabolizes methionine, another amino acid found in protein-rich foods like meat, eggs, and dairy. Under normal circumstances, homocysteine is quickly converted into other, harmless substances with the help of B vitamins (particularly B6, B9/folate, and B12). However, when this conversion process is impaired — due to genetic factors, nutrient deficiencies, or aging — homocysteine accumulates in the blood. Elevated homocysteine (hyperhomocysteinemia) is a well-established independent risk factor for cardiovascular disease, stroke, venous thrombosis, and cognitive decline.

The connection between homocysteine and brain health is particularly relevant to anti-aging medicine. Multiple large epidemiological studies have linked elevated homocysteine to increased risk of Alzheimer’s disease, vascular dementia, and age-related cognitive impairment. The leading hypothesis is that homocysteine promotes atherosclerosis in the small blood vessels of the brain and may have direct neurotoxic effects. Homocysteine also appears to promote the formation of tau tangles and amyloid plaques in the brain, which are the hallmarks of Alzheimer’s pathology. The beautiful thing about homocysteine as a biomarker is that it is highly modifiable. When folate, B12, and B6 levels are optimized, homocysteine levels typically drop quickly. This means that checking your homocysteine level gives you a window into both your cardiovascular and neurological aging risk, as well as an actionable target for intervention. If your homocysteine is elevated, supplementing with methylated B vitamins (particularly methylfolate and methylcobalamin) can often bring it back within the normal range.

6. Thyroid Panel (TSH, Free T3, Free T4)

The thyroid gland’s role in anti-aging is frequently underestimated, but consider this: thyroid hormones regulate the metabolic rate of virtually every cell in the human body. When thyroid function declines — even falling within the “normal” but suboptimal range — the consequences ripple across every organ system, from the heart and brain to the skin and muscles. Many of the symptoms commonly attributed to “just getting older” — fatigue, weight gain, cold intolerance, dry skin, hair loss, brain fog, depression, and high cholesterol — are often actually signs of suboptimal thyroid function.

From an anti-aging perspective, maintaining optimal thyroid hormone levels — not just “within normal range” on a lab report — is important for keeping metabolism active, supporting cognitive function, maintaining healthy body composition, and promoting cellular turnover. A complete thyroid panel for anti-aging purposes should include TSH (which tells you how hard the pituitary is working to stimulate the thyroid), Free T4 (the main storage form of thyroid hormone), and Free T3 (the active form that actually does the work in cells). Some individuals with “normal” TSH actually have poor conversion of T4 to T3, meaning their active hormone levels are suboptimal despite TSH appearing normal. Others have thyroid antibodies indicating autoimmune thyroiditis (Hashimoto’s disease), the most common cause of hypothyroidism in iodine-sufficient countries. Identifying these patterns through comprehensive thyroid testing allows for targeted treatment that can significantly improve quality of life and slow age-related decline. At-home thyroid testing through Personalabs makes it easy to get a complete panel without a doctor’s visit.

7. Vitamin D (25-Hydroxy Vitamin D)

Vitamin D has emerged as one of the most researched and clinically significant anti-aging nutrients in modern medicine. While classically understood for its role in bone health (enhancing calcium absorption), research over the past two decades has revealed that vitamin D receptors are present in virtually every tissue and cell type in the body, including the brain, heart, immune system, pancreas, and skeletal muscle. This widespread distribution suggests vitamin D plays roles far beyond calcium metabolism, influencing everything from immune regulation and cardiovascular health to cognitive function and cancer prevention.

Large-scale observational studies consistently find that people with lower vitamin D levels have higher rates of virtually every major age-related disease, including osteoporosis, heart disease, type 2 diabetes, multiple sclerosis, autoimmune diseases, and common cancers of the breast, colon, and prostate. Randomized controlled trials of vitamin D supplementation have shown reductions in respiratory infections, fewer bone fractures in the elderly, and reduced autoimmune disease activity. The optimal range for vitamin D is a matter of some debate, but most anti-aging practitioners aim for 40–60 ng/mL (100–150 nmol/L), higher than the conventional “sufficient” threshold of 20 ng/mL. Because vitamin D is fat-soluble and can accumulate to toxic levels with excessive supplementation, annual testing is essential to calibrate your dose. Your Personalabs test results will tell you whether you need to supplement, and how much, to achieve and maintain optimal levels year-round. This makes vitamin D monitoring one of the most straightforward and impactful anti-aging interventions available.

8. Testosterone (Total & Free) & Estrogen

Sexual hormones are not just about libido — they are fundamental regulators of body composition, muscle mass, bone density, cognitive function, cardiovascular health, and overall vitality in both men and women. Testosterone, the primary male sex hormone,declines at a rate of approximately 1% per year after age 30 in most men, and this decline is associated with measurable losses in muscle mass, strength, bone density, and energy. In women, estrogen and progesterone decline sharply during menopause, dramatically shifting the risk profile for osteoporosis, cardiovascular disease, and cognitive decline.

For men concerned about anti-aging, knowing your total testosterone (the amount bound to proteins in the blood) and free testosterone (the active, unbound fraction) is critical for assessing where you stand relative to age-matched norms. Low testosterone is associated not just with reduced libido, but with increased risk of metabolic syndrome, type 2 diabetes, osteoporosis, and accelerated cardiovascular aging. For women, comprehensive hormone testing should include not just estrogen, but also progesterone, testosterone, DHEA-S, and cortisol, as the hormonal landscape becomes increasingly complex during perimenopause and menopause. Hormone replacement therapy, when appropriately prescribed and monitored, has shown significant benefits for quality of life, physical performance, and possibly longevity in individuals with clinically confirmed deficiencies. However, hormone therapy is not without risks, making accurate baseline testing and ongoing monitoring essential. Personalabs offers comprehensive hormone panels for both men and women that include all key anti-aging hormone markers.

9. NT-proBNP (Natriuretic Peptide)

While many people focus on cholesterol when thinking about heart health, the real predictor of cardiovascular aging is the health and function of the heart muscle itself. NT-proBNP (N-terminal pro-brain natriuretic peptide) is a hormone produced by the heart in response to excessive stretching of the heart muscle walls. When the heart has to work harder due to high blood pressure, narrowed arteries, or weakening heart muscle, NT-proBNP levels rise. This makes NT-proBNP an extraordinarily sensitive marker of cardiac strain, heart failure risk, and overall cardiovascular aging that most standard cholesterol panels completely miss.

Elevated NT-proBNP is independently associated with increased risk of heart failure, heart attack, stroke, and all-cause mortality in numerous large-scale studies. Unlike cholesterol markers, which tell you about the health of your blood vessel lining, NT-proBNP tells you how your heart itself is coping with its workload. Because heart failure often develops silently over years before symptoms appear, NT-proBNP testing provides a window for early intervention before catastrophic cardiac events occur. The test is already widely used in clinical cardiology to evaluate patients with shortness of breath and to monitor known heart failure patients. In the anti-aging context, NT-proBNP gives you a baseline measure of your cardiac aging trajectory that you can track over time. Lifestyle factors that lower NT-proBNP include regular aerobic exercise, blood pressure control, Mediterranean diet, stress management, and maintaining a healthy weight. Having your NT-proBNP checked gives you and your healthcare provider actionable information about the single most important organ for longevity — your heart.

10. GGT (Gamma-Glutamyl Transferase) & Liver Health

The liver is your body’s primary detoxification organ, and its function is central to anti-aging. As you age, liver function naturally tends to decline, reducing your body’s ability to clear toxins, process medications, metabolize hormones, and maintain metabolic balance. Gamma-Glutamyl Transferase (GGT) is an enzyme found primarily in the liver and bile ducts, and it serves as one of the most sensitive markers of liver function and oxidative stress. Elevated GGT is often the first sign of liver dysfunction, appearing before other liver enzymes (such as ALT and AST) become abnormal.

GGT is particularly valuable in anti-aging medicine because it is highly responsive to oxidative stress and alcohol consumption, and it is an excellent overall indicator of liver health and detoxification capacity. Research has shown that elevated GGT is associated with increased risk of cardiovascular disease, type 2 diabetes, and all-cause mortality — independent of other liver markers. GGT also works synergistically with hs-CRP: when both are elevated, the cardiovascular risk is substantially higher than either marker alone, suggesting active liver inflammation and systemic oxidative stress. A GGT test is included in most comprehensive metabolic panels and provides a inexpensive but highly informative window into your liver’s functional age. Supporting liver health through anti-inflammatory nutrition, limiting alcohol, avoiding environmental toxins, staying hydrated, and using herbs such as milk thistle (under practitioner guidance) can help keep GGT levels optimal as you age.

Comparison Table: Key Anti-Aging Blood Tests

Test	What It Measures	Optimal Anti-Aging Range	Key Actions if Abnormal
DHEA-S	Adrenal androgen precursor (“youth hormone”)	200–400 µg/dL (age 30s)	Lifestyle optimization; possible supplementation under care
IGF-1	Growth factor for tissue repair and maintenance	Mid-reference range for age	Adjust exercise, protein intake, sleep
HbA1c	Average blood sugar and glycation burden	<5.4% (ideal); <5.7% (normal)	Diet/exercise to improve insulin sensitivity
Fasting Insulin	Insulin sensitivity and metabolic age	2–6 µIU/mL (fasting)	Low-carb diet, exercise, weight management
hs-CRP	Chronic systemic inflammation	<1.0 mg/L	Anti-inflammatory diet, exercise, stress reduction
Homocysteine	Cardiovascular and neurological aging risk	<8 µmol/L	B vitamin supplementation (methylfolate, B12)
Free T3	Active thyroid hormone	3.0–4.0 pg/mL	Optimize thyroid function; address conversion issues
Vitamin D (25-OH)	Overall vitamin D status	40–60 ng/mL (100–150 nmol/L)	Sun exposure and/or supplementation as needed
NT-proBNP	Cardiac strain and heart failure risk	<125 pg/mL (under 75)	Cardiovascular workup; exercise and BP control
GGT	Liver function and oxidative stress	<30 U/L (men); <20 U/L (women)	Limit alcohol; support liver with diet/supplements

Frequently Asked Questions (FAQ)

How often should I test these anti-aging markers?

For most of these markers, annual testing is sufficient to track trends and identify problems early. However, if you are actively making lifestyle changes or working with a practitioner on hormone optimization, you may want to re-test every three to six months initially to see how your body responds. Once you have established stable baseline values and healthy habits, returning to annual monitoring is typically adequate. Some markers like hs-CRP and glucose can change relatively quickly in response to lifestyle, so more frequent testing can be motivating and informative during an active improvement phase.

Can I test all of these anti-aging markers at home through Personalabs?

Personalabs offers a range of comprehensive panels that cover most or all of these key anti-aging markers. Depending on the specific combination you choose, you may be able to get a complete anti-aging panel from a single sample, or you might combine two panels for maximum coverage. The advantage of using Personalabs for anti-aging testing is the convenience of sample collection from home, the speed of results delivery, and the ability to review your data through their secure online portal. You can explore their full menu of hormone and longevity panels at Personalabs to find the best fit for your anti-aging health monitoring goals.

What is the most important anti-aging blood test?

This is a common question, but it reflects a misunderstanding of how longevity science works. No single marker tells the whole story — the power of anti-aging testing lies in looking at multiple markers together to understand the patterns in your biology. That said, if forced to prioritize, many anti-aging practitioners would point to hs-CRP (inflammation) and HbA1c (glucose metabolism) as the two most impactful because chronic inflammation and dysregulated glucose are the two broadest drivers of age-related disease. Together with a fasting insulin test, these markers give you a metabolic health snapshot that informs most other decisions about diet, exercise, and supplementation.

I am already taking supplements. Will this affect my test results?

Yes, supplements can significantly affect many anti-aging blood markers. For example, vitamin D supplementation will obviously affect your vitamin D result — which is exactly why you should test, to know if your current dose is sufficient. Fish oil supplements can lower triglycerides and affect hs-CRP. B vitamins will affect homocysteine. Antioxidant supplements may affect oxidative stress markers. The key is to be consistent about when you take your supplements relative to the test (unless instructed otherwise), and then interpret your results in the context of your current supplement regimen. Over time, your results will tell you whether your supplement protocol is working as intended.

Should I work with a doctor to interpret my anti-aging blood test results?

While at-home testing provides convenient access to these important biomarkers, we strongly recommend sharing your results with a qualified healthcare provider — particularly if you are considering hormone therapy, have results that fall significantly outside the normal range, or have pre-existing medical conditions. Anti-aging medicine is a specialized field, and practitioners who focus on longevity optimization can help you develop a personalized protocol based on your complete health picture. If you are generally healthy and your results fall within acceptable ranges, reviewing them during your annual physical with your primary care physician is a perfectly appropriate approach.

Conclusion

The era of waiting for disease to strike before seeking treatment is giving way to a new paradigm of proactive, data-driven health management. Anti-aging blood tests give you the measurable data you need to understand how your body is aging at the biological level — information that was simply not accessible to most people even a decade ago. By annually monitoring the ten key anti-aging markers covered in this guide — DHEA-S, IGF-1, HbA1c and fasting insulin, hs-CRP, homocysteine, thyroid hormones, vitamin D, sex hormones, NT-proBNP, and GGT — you create a longitudinal health record that reveals trends over time, identifies areas of vulnerability, and empowers you to make targeted, evidence-based lifestyle interventions. The science of longevity is no longer confined to research laboratories. With at-home testing options from Personalabs, you have direct access to the same biomarkers that longevity physicians use to optimize their patients’ healthspan and lifespan. Take control of your aging process today — your future self will thank you for every test you run and every data point you collect.

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