Lab Work for Men Over 40: Understanding Your Numbers Beyond 'Normal'
Phase 1 → Phase 2 Bridge | 12 min read | The Tempered Man
Not medical advice. This article is for informational purposes only. Reference ranges, markers, and interpretations discussed here are educational — not a substitute for guidance from your physician. Always work with a qualified medical professional before making decisions based on your lab results.
Most men over 40 have never seen their own lab work. Or they’ve had it done once, been told everything looks normal, and moved on — with no clearer picture of what’s actually happening inside their body than before they walked in.
This is a problem.
The foundation articles in this series cover sleep, nutrition, training, and stress — the inputs you can control with behavior. But you cannot optimize what you cannot measure. Lab work is how you find out whether your inputs are actually translating into the outcomes you’re working toward, and whether there are specific deficiencies or imbalances driving symptoms you’ve been attributing to age.
This article covers the panel I run every four months, why each marker matters, what to look for, and two things the medical establishment rarely tells you: that the reference ranges on your lab report have shifted dramatically downward over the past two decades, and that normal and optimal are not the same number.
How Often Should You Get Labs Done?
My personal cadence is every four months. That frequency lets me track how my numbers respond to changes in training, nutrition, supplementation, or protocol adjustments in near real-time. For most men starting out, twice per year is the right recommendation — enough to establish a trend line and catch changes before they compound, without over-monitoring. More frequent testing without changes in protocol rarely adds useful information — it can add anxiety.
The first panel is the most important one. It establishes your baseline — where you actually are, not where you assume you are. Every subsequent panel is measured against that baseline. Without it, you are managing blind.
One important note on consistency: get your labs drawn at the same time of day, ideally morning and fasted. Testosterone in particular has a significant diurnal variation — levels are meaningfully higher in the morning than in the afternoon. Comparing a morning draw to an afternoon draw tells you nothing useful. Consistency in draw conditions is what makes trend data reliable.
Normal and optimal are not the same number. Normal tells you where you fall relative to a reference population. Optimal tells you where you function best. For men over 40, that distinction is everything. |
The Problem With ‘Normal’ — And Why the Ranges Themselves Have Changed
When your doctor reviews your lab results and tells you everything looks normal, what they mean is: your numbers fall within the reference range printed on the lab report. That sounds reassuring. It is less reassuring when you understand how those reference ranges are established and how dramatically they have shifted over the past two decades.
Reference ranges are derived from the population being tested — a large sample representing statistical distribution, not health optimization. If the average testosterone level in the tested population declines over time — which it has, significantly, across multiple decades and multiple studies — the reference range shifts down to match. A man whose testosterone was considered borderline low in 2000 may now be told his levels are perfectly normal. Nothing about his biology improved. The benchmark moved.
The Range Shift: Then vs. Now
The table below illustrates how reference ranges for three key androgen markers have shifted over approximately two decades. Note that these are approximate figures — specific reference ranges vary by lab, methodology, and patient population. The directional trend is consistent across the literature.
Marker | Range ~2000 | Range Today | What Shifted |
Total Testosterone | 400–1,200 ng/dL | 264–916 ng/dL | Floor dropped ~35% |
Free Testosterone | ~9–30 pg/mL | ~5–21 pg/mL | Lower end redefined down |
DHT | 30–85 ng/dL | 16–79 ng/dL | Floor dropped significantly |
What this means practically: a man presenting with total testosterone of 280 ng/dL today will likely be told his levels are normal. Twenty years ago, that same number would have flagged concern. His symptoms — low energy, poor body composition, reduced drive, impaired recovery — are real. His labs are ‘normal.’ The gap between those two statements is where men get stuck.
This is not a conspiracy. It is a statistical artifact of a population whose average hormone levels have genuinely declined — driven by changes in body composition, environmental exposures, sedentary behavior, and chronic stress. The reference range reflects that decline. It does not endorse it.
Normal Is Not Optimal
Normal tells you where you fall relative to a reference population. Optimal tells you where you function best. For most men over 40, those are different numbers — and the distance between them is exactly where the symptoms live.
A total testosterone of 400 ng/dL is normal. So is 800 ng/dL. A man at 400 and a man at 800 are most likely having very different experiences of their lives. Both will be told their labs are fine.
The goal of this article — and of the Tempered approach to lab work more broadly — is not to teach men to chase arbitrary numbers. It is to help men understand what their numbers mean in context, what the trend looks like over time, and when the gap between normal and how they actually feel is worth investigating further with a knowledgeable physician or consultant.
A Note on the Medicate-First Reflex
This is not medical advice, and nothing here should be read as guidance on whether or not to take any medication. What it is, is an observation about how conventional medicine typically responds to lab results that fall outside reference ranges — and why the Tempered approach starts somewhere different.
When a 45-year-old man presents with mildly elevated cholesterol, mildly elevated blood glucose, and low energy, the conventional medical response is frequently a prescription — statins, metformin, or some combination. The lifestyle variables that drive those numbers — poor sleep, inadequate nutrition, sedentary behavior, chronic stress, poor body composition — often receive less attention than the medication that addresses the downstream symptom.
The Tempered framework starts from a different premise: optimize the inputs first. Sleep, nutrition, training, stress management, body composition. Get those dialed in for six months and get retested. For a significant number of men, numbers that looked like they needed medication improve substantially — sometimes dramatically — when the behaviors driving them are corrected. Not always. But often enough that it is the right place to start.
This is not anti-medicine. Medicine is a tool. Specific conditions require it. The point is sequencing — lifestyle optimization first, medication when lifestyle optimization has been genuinely executed and isn’t sufficient. That sequence matters, and most men are never offered it as an option.
The Panel: 16 Markers and Why Each One Matters
Below is the panel I run with a private provider — 16 markers that together provide a comprehensive picture of hormone health, metabolic function, cardiovascular risk, organ health, and immune status. Each marker is explained: what it measures, why it matters for men over 40, and what to look for beyond the reference range.
Hormonal Markers
Testosterone — Free and Total Why it matters: The primary male androgen. Total testosterone measures all testosterone in the blood. Free testosterone measures the bioavailable fraction — the portion not bound to SHBG or albumin and therefore available for use by cells and tissues. Both numbers matter. A man can have adequate total testosterone but low free testosterone if SHBG is elevated, resulting in symptoms of low testosterone despite a normal total number. What to look for: Look at free testosterone as carefully as total. Symptoms — energy, libido, body composition, cognitive sharpness — correlate more closely with free testosterone than total. Track trend over time, not just a single snapshot. Optimal vs. normal: Many men report peak subjective wellbeing in the upper quartile of the reference range — but symptoms and trends matter more than any single number. ‘Normal’ at 320 ng/dL and ‘normal’ at 780 ng/dL are clinically different experiences. The goal is not to chase a number. It is to understand where you function best and track whether you are moving toward or away from it. |
SHBG — Sex Hormone Binding Globulin Why it matters: SHBG is the protein that binds testosterone (and other hormones) in the blood, making them unavailable for cellular use. Elevated SHBG effectively reduces bioavailable testosterone even when total testosterone appears adequate. SHBG tends to increase with age, which is one of the mechanisms through which free testosterone declines more rapidly than total testosterone in older men. What to look for: Elevated SHBG with normal total testosterone and low free testosterone explains a specific symptom pattern — low T symptoms despite a technically normal total number. SHBG is the missing piece that makes sense of that picture. Trends matter: rising SHBG over sequential panels warrants attention. |
Estradiol — Ultrasensitive LC/MS Why it matters: Estradiol is the primary estrogen. Estrogen in men has an unfair reputation — it is not the enemy. Estradiol is essential for bone density, cardiovascular health, cognitive function, libido, and joint health in men. The problem is not estrogen itself — it is estrogen out of balance with testosterone, or estrogen elevated beyond the range where it supports rather than impairs function. What to look for: The ultrasensitive LC/MS method is the right assay for men — the standard estradiol test used for women is less accurate at the lower male range. Look for estradiol in balance with testosterone. Symptoms of excess estrogen — water retention, mood instability, reduced libido, gynecomastia — are worth investigating if estradiol is elevated relative to testosterone. But do not try to drive estradiol to zero. Men need estrogen. Optimal vs. normal: A more detailed article on estradiol, aromatization, and estrogen management in men is coming in Phase 2. For now: estrogen is not bad. It is a balance issue. |
DHT — Dihydrotestosterone Why it matters: DHT is the most potent androgen — significantly more active than testosterone at the androgen receptor. It is produced from testosterone via the enzyme 5-alpha reductase and plays a key role in libido, assertiveness, mood, and cognitive function. DHT is also the androgen most associated with hair loss and prostate effects, which has given it a complicated reputation. What to look for: Low DHT, often driven by excessive suppression of the 5-alpha reductase pathway, is associated with symptoms that look like low testosterone — including sexual dysfunction, mood disturbance, and cognitive fog. Track alongside testosterone and SHBG for a complete androgen picture. |
FSH & LH — Follicle Stimulating Hormone and Luteinizing Hormone Why it matters: LH signals the testes to produce testosterone. FSH signals sperm production. Together they represent the upstream hormonal command from the pituitary. These markers are critical for understanding whether low testosterone is primary (the testes are not responding to the signal) or secondary (the signal itself is insufficient). That distinction matters significantly for how low testosterone is addressed. What to look for: Elevated LH with low testosterone suggests primary hypogonadism — the testes are not responding. Low LH with low testosterone suggests secondary hypogonadism — the signaling pathway is the issue. Both contexts require different approaches and different conversations with a physician. |
DHEA-Sulfate Why it matters: DHEA-S is a precursor hormone produced primarily by the adrenal glands that converts into sex hormones including testosterone and estrogen. It is one of the most abundant hormones in the body and declines significantly with age — levels at 70 are typically 10-20% of peak levels. DHEA-S is a reliable marker of adrenal function and the broader hormonal aging picture. What to look for: Declining DHEA-S correlates with reduced energy, libido, immune function, and cognitive performance. Correlation does not always mean causation — but persistent low DHEA-S is a signal worth understanding in context with your physician. It is a useful marker for tracking the pace of hormonal aging and the impact of lifestyle interventions. |
Prolactin Why it matters: Prolactin is a pituitary hormone most associated with lactation but present in men at low levels where it plays a role in reproductive health and immune function. Elevated prolactin in men suppresses testosterone and LH, reduces libido, and can indicate pituitary pathology that warrants further investigation. What to look for: Normal prolactin in men is low. Elevated levels — especially persistently elevated — warrant follow-up with a physician to rule out pituitary adenoma or other causes. Chronically elevated prolactin is a meaningful suppressor of the hormonal axis. |
IGF-1 — Insulin-like Growth Factor 1 Why it matters: IGF-1 is produced by the liver in response to growth hormone (GH) and is the primary mediator of GH’s anabolic effects. Because GH itself is pulsatile and difficult to measure directly, IGF-1 serves as a stable proxy for GH activity. IGF-1 supports muscle growth, fat metabolism, tissue repair, and has roles in cognitive function and longevity research. What to look for: IGF-1 declines with age. Suboptimal IGF-1 correlates with poor recovery, difficulty building muscle, increased body fat, and reduced energy. For men using peptide protocols in Phase 3, IGF-1 is a primary tracking marker. |
Metabolic & Organ Health Markers
Comprehensive Metabolic Panel (CMP) Why it matters: The CMP covers a broad set of markers including blood glucose, electrolytes, kidney function (BUN, creatinine), and liver enzymes (ALT, AST, ALP). It is the baseline metabolic snapshot — a check on how the major processing systems of the body are functioning. What to look for: Flag any values trending outside normal — particularly fasting glucose (early insulin resistance indicator), liver enzymes (elevated in the context of alcohol, medication, or metabolic stress), and kidney markers (important baseline before adding any supplement protocol). The CMP is context, not a single data point. |
Kidney Profile Why it matters: A focused look at kidney function markers — creatinine, BUN (blood urea nitrogen), and eGFR (estimated glomerular filtration rate). Kidney health is foundational for anyone taking supplements, medications, or advanced compounds. It is also a sensitive indicator of hydration status and protein metabolism. What to look for: Men eating high protein diets will often show slightly elevated creatinine — this is normal and not a kidney function concern. Context matters. eGFR is the most clinically meaningful kidney function marker. Any consistent downward trend warrants physician attention. |
GGT — Gamma-Glutamyl Transferase Why it matters: GGT is a liver enzyme particularly sensitive to alcohol consumption and liver stress. It is one of the earliest markers to rise with regular alcohol intake — often before other liver enzymes. It also has utility as a cardiovascular risk marker independent of its liver function role. What to look for: For men who drink, GGT is the honest marker. It does not lie about alcohol consumption the way subjective self-report does. Elevated GGT in the context of regular drinking is a clear signal. Elevated GGT without obvious alcohol explanation warrants further investigation. |
Thyroid Panel with TSH Why it matters: Thyroid function affects metabolism, energy, body weight, mood, cognitive function, and cardiovascular health. TSH (thyroid stimulating hormone) is the primary screening marker — elevated TSH suggests underactive thyroid (hypothyroidism), which is significantly more common in men than commonly recognized. A full panel including free T3 and free T4 provides a more complete picture than TSH alone. What to look for: Thyroid dysfunction is a common and frequently missed contributor to the symptom cluster men attribute to aging — fatigue, weight gain, cognitive fog, low mood, cold intolerance. If your TSH is normal but symptoms persist, ask for free T3 and free T4. TSH alone misses a meaningful percentage of thyroid dysfunction. |
Cardiovascular Markers
Lipid Panel Cardio IQ Why it matters: The Cardio IQ goes beyond standard lipid panels to provide LDL particle number and particle size — the markers with the strongest predictive relationship to cardiovascular events. Standard LDL cholesterol as a single number is a blunt instrument. LDL particle number and small dense LDL particles are the more meaningful risk markers. What to look for: Standard lipid panels showing ‘normal’ LDL can coexist with high LDL particle number and elevated cardiovascular risk. The Cardio IQ version provides the particle data that the basic panel misses. This is the test that tells you what is actually in your arteries, not just what is in your blood. Optimal vs. normal: Optimizing this panel is where dietary fat quality, omega-3 intake, exercise, and targeted supplementation (like citrus bergamot) intersect. Track it. |
Apolipoprotein Evaluation (ApoB / ApoA1) Why it matters: ApoB is a protein found on atherogenic (artery-hardening) lipid particles and is increasingly considered the most clinically relevant cardiovascular risk marker available. ApoA1 is associated with HDL. The ApoB:ApoA1 ratio provides a direct risk signal that outperforms standard lipid panels in multiple large studies. What to look for: If you can only add one cardiovascular marker beyond a standard lipid panel, ApoB is it. Elevated ApoB in the context of otherwise normal lipid panels is the pattern most likely to be missed — and most likely to matter. |
PSA — Prostate Specific Antigen (Free and Total) Why it matters: PSA is a protein produced by prostate tissue. Elevated PSA can indicate prostate enlargement, inflammation, or — at significantly elevated levels — prostate cancer. For men over 40, PSA is a baseline marker that should be tracked over time. Trend and rate of change are more meaningful than any single reading. What to look for: PSA is not a prostate cancer test — it is a prostate health signal. A single elevated reading needs context (recent ejaculation, prostate exam, infection all raise PSA temporarily). The trend line across multiple tests over time is what matters. Any significant upward trend warrants physician follow-up. Optimal vs. normal: For men considering TRT or using testosterone-based protocols: testosterone can influence PSA. Baseline PSA before initiating any protocol is important for comparison. |
Blood Health Marker
CBC with Differential and Platelets Why it matters: The complete blood count measures red blood cells, white blood cells, hemoglobin, hematocrit, and platelets. It provides a snapshot of immune system status, oxygen-carrying capacity, and blood health. For men on testosterone protocols, hematocrit (the proportion of blood volume that is red blood cells) is a critical monitoring marker — testosterone increases red blood cell production, and elevated hematocrit increases blood viscosity and cardiovascular risk. What to look for: Hematocrit above 52-54% in the context of a testosterone protocol is a signal that requires attention and physician discussion. Hemoglobin trends down in iron deficiency; white blood cell patterns can indicate infection, immune stress, or inflammatory states. The CBC is context — it informs interpretation of everything else. |
Where to Get This Panel
Several options exist for getting comprehensive lab work done without waiting for a standard annual physical that may not include all of these markers.
Direct-to-consumer lab testing services — including Vanguard Performance — allow you to order your own panel, get drawn at a local lab, and receive your results directly. This approach bypasses the common experience of having your doctor order a basic panel that misses half of what you actually need to know.
Telehealth men’s health providers who specialize in hormone optimization — covered in Phase 3 — typically run comprehensive panels as part of their intake and ongoing monitoring. If you are working with a knowledgeable physician/ consultant in this space, their panel will likely overlap significantly with what is described here.
Primary care is a reasonable option if your physician is conversant in men’s hormone health and willing to order the full panel. In practice, many are not — and the standard annual physical rarely includes free testosterone, SHBG, estradiol, IGF-1, or Cardio IQ lipids. Know what you need and advocate for it.
The Bottom Line
If You Can Only Run a Basic Panel, Start Here. The full 16-marker panel is the right long-term approach. But if cost, access, or your physician’s willingness to order a comprehensive panel is a barrier, this is the minimum set of markers that gives you a meaningful starting picture: Total Testosterone and Free Testosterone — the foundation of everything else. SHBG — explains why total and free can tell different stories. Estradiol (ultrasensitive LC/MS) — critical for hormone balance, often overlooked. Comprehensive Metabolic Panel (CMP) — liver, kidney, blood glucose, electrolytes. Lipid Panel — LDL, HDL, triglycerides, cardiovascular risk baseline. Complete Blood Count (CBC) — red cells, white cells, platelets, overall health picture. Six markers. Run it. Establish your baseline. Add the remaining markers as access and resources allow. You cannot manage what you cannot measure. Lab work is not a one-time event — it is a recurring practice that gives you an objective picture of how your inputs are translating into outcomes, and where specific deficiencies or imbalances are worth addressing.
Get your baseline. Track it twice a year at minimum. Learn to read your own numbers in context — not just whether they are in range, but whether they are trending in the right direction and whether they reflect how you actually feel.
The gap between normal and optimal is where most men over 40 are living. Closing that gap — with lifestyle first, optimization tools where warranted — is what this framework is built around.