Health checklist for men over 40: the 10 tests that matter most
The essential health screening checklist for men over 40. Learn which blood tests, physical exams, and fitness assessments to get — and how often — to catch problems early.
After 40, the rules change. Your body starts losing muscle at 3-5% per decade. Testosterone drops 1-2% every year. Cardiovascular risk doubles every ten years. And the most dangerous conditions — heart disease, type 2 diabetes, colon cancer — often develop silently for years before symptoms appear.
The difference between men who age well and men who don’t isn’t genetics or luck — it’s information. Knowing what to test, when, and what the results actually mean gives you years of lead time to intervene before a problem becomes a crisis.
This is the definitive screening checklist for men over 40: the 10 tests with the strongest evidence for catching age-related disease early, plus the functional fitness markers that predict how well you’ll age.
What you’ll learn:
- The 10 essential health tests after 40
- How often to get each test
- How to read your results like a longevity expert
- Functional fitness tests you can do at home
- Health screening and biological age
- How SuperAge helps you track it all
- FAQ
The 10 essential health tests for men over 40
1. Comprehensive lipid panel
What it measures: Total cholesterol, LDL-C, HDL-C, triglycerides, and ideally ApoB and Lp(a).
Why it matters after 40: Cardiovascular disease is the #1 killer of men globally. By 40, arterial plaque has been accumulating for decades — often silently. A standard lipid panel catches the most common risk factors, but ApoB is a more accurate measure of atherogenic particle number, and Lp(a) identifies a genetically determined risk that affects 1 in 5 men.
Optimal ranges (not just “normal”):
| Marker | Lab “normal” | Longevity optimal |
|---|---|---|
| LDL-C | < 130 mg/dL (3.4 mmol/L) | < 100 mg/dL (2.6 mmol/L) |
| HDL-C | > 40 mg/dL (1.0 mmol/L) | > 55 mg/dL (1.4 mmol/L) |
| Triglycerides | < 150 mg/dL (1.7 mmol/L) | < 100 mg/dL (1.1 mmol/L) |
| TG/HDL ratio | < 3.5 | < 1.5 |
| ApoB | < 130 mg/dL | < 90 mg/dL |
| Lp(a) | — | < 50 mg/dL (125 nmol/L) |
How often: Every 1-2 years. Lp(a) once in your lifetime (it’s genetically fixed).
2. Metabolic panel: fasting glucose, HbA1c, and insulin
What it measures: Blood sugar control and insulin sensitivity — the earliest markers of metabolic dysfunction.
Why it matters after 40: Type 2 diabetes takes 10-15 years to develop. By the time fasting glucose hits the diagnostic threshold (126 mg/dL / 7.0 mmol/L), significant damage has already occurred. Catching insulin resistance early — through fasting insulin and HbA1c — gives you years of intervention time.
Optimal ranges:
| Marker | Diagnostic threshold | Longevity optimal |
|---|---|---|
| Fasting glucose | < 100 mg/dL (5.6 mmol/L) | 72-85 mg/dL (4.0-4.7 mmol/L) |
| HbA1c | < 5.7% | < 5.3% |
| Fasting insulin | < 25 μIU/mL | < 8 μIU/mL |
| TyG index | — | < 8.5 |
How often: Annually. More frequently if prediabetic or family history of diabetes.
3. Complete blood count (CBC) with differential
What it measures: Red blood cells, white blood cells, platelets, and their subtypes.
Why it matters after 40: A CBC reveals anemia, immune dysregulation, chronic inflammation, and even early signs of blood cancers. The neutrophil-to-lymphocyte ratio (NLR) and lymphocyte percentage are powerful markers of immune aging and systemic inflammation.
Key markers to watch:
| Marker | What it reveals |
|---|---|
| Hemoglobin | Anemia, oxygen-carrying capacity |
| WBC count | Immune activation (lower is generally better within normal range) |
| NLR | Chronic inflammation (optimal < 2.0) |
| Lymphocyte % | Immune reserve (declining with immunosenescence) |
| MCV | Red cell size (elevated in B12/folate deficiency) |
| Platelets | Clotting function |
How often: Annually.
4. Comprehensive metabolic panel + liver function
What it measures: Kidney function (creatinine, BUN, eGFR), electrolytes, and liver enzymes (AST, ALT, GGT, alkaline phosphatase).
Why it matters after 40: Kidney function declines with age, and early impairment is entirely asymptomatic. Liver enzymes detect fatty liver disease — now affecting an estimated 30% of adults in Western countries — long before it progresses to cirrhosis.
Key thresholds:
| Marker | Standard normal | Longevity optimal |
|---|---|---|
| Creatinine | 0.7-1.3 mg/dL | Stable year-over-year |
| eGFR | > 60 mL/min | > 90 mL/min |
| ALT | < 56 U/L | < 25 U/L |
| GGT | < 65 U/L | < 25 U/L |
| Uric acid | 3.5-7.2 mg/dL | 4.0-5.5 mg/dL |
How often: Annually.
5. Thyroid function (TSH + free T4)
What it measures: Thyroid hormone production and regulation.
Why it matters after 40: Subclinical thyroid dysfunction affects 5-10% of men over 40 and causes fatigue, weight gain, brain fog, and depression — symptoms often dismissed as “just aging.” Thyroid function directly impacts metabolic rate, cholesterol levels, and biological aging.
Optimal ranges:
| Marker | Lab normal | Optimal |
|---|---|---|
| TSH | 0.4-4.0 mIU/L | 1.0-2.5 mIU/L |
| Free T4 | 0.8-1.8 ng/dL | Mid-range for age |
How often: Every 2-3 years if normal. Annually if symptomatic or previously abnormal.
6. Testosterone (total and free)
What it measures: Androgen levels and bioavailable testosterone.
Why it matters after 40: Testosterone declines by approximately 1-2% per year after age 30. By 45, an estimated 40% of men have levels below the lower reference range. Low testosterone is associated with increased visceral fat, muscle loss, osteoporosis, cardiovascular risk, depression, and accelerated biological aging. Erectile dysfunction — often dismissed as a hormonal issue — is also an early marker of vascular disease; see erectile dysfunction as a cardiovascular warning sign.
Optimal ranges:
| Marker | Lab normal | Optimal |
|---|---|---|
| Total testosterone | 264-916 ng/dL (9.2-31.8 nmol/L) | 500-900 ng/dL (17.4-31.2 nmol/L) |
| Free testosterone | 5-21 ng/dL | Upper half of range for age |
| SHBG | 10-57 nmol/L | Mid-range |
Important: Always test testosterone in the morning (before 10 AM) when levels peak. A single low reading should be confirmed with a repeat test before any treatment decisions.
How often: Every 2-3 years. Annually if symptoms of low testosterone are present.
7. PSA (prostate-specific antigen)
What it measures: A protein produced by the prostate gland. Elevated levels may indicate prostate enlargement, infection, or cancer.
Why it matters after 40: Prostate cancer is the most common non-skin cancer in men. While PSA screening is controversial (due to overdiagnosis of slow-growing cancers), it remains the best available early detection tool. The key is understanding PSA in context — velocity (rate of change) matters more than a single number. For a deeper look at how prostate health connects to biological age, including BPH, PSA interpretation, and prostate aging after 50, see the dedicated guide.
What the numbers mean:
| PSA level | Interpretation |
|---|---|
| < 1.0 ng/mL | Very low risk |
| 1.0-2.5 ng/mL | Low risk |
| 2.5-4.0 ng/mL | Borderline — monitor velocity |
| > 4.0 ng/mL | Elevated — further evaluation recommended |
| PSA velocity > 0.75 ng/mL/year | Concerning regardless of absolute level |
How often: Discuss with your doctor starting at age 40 (earlier if Black or family history of prostate cancer). If baseline < 1.0, retest every 2-5 years. If baseline > 1.0, consider annual testing.
8. Inflammatory markers: hs-CRP and homocysteine
What they measure: Systemic chronic inflammation and methylation status.
Why they matter after 40: Chronic low-grade inflammation (“inflammaging”) is the common thread connecting cardiovascular disease, cancer, neurodegeneration, and accelerated aging. Homocysteine is an independent cardiovascular risk factor and marker of B-vitamin status.
Optimal ranges:
| Marker | Lab normal | Longevity optimal |
|---|---|---|
| hs-CRP | < 3.0 mg/L | < 1.0 mg/L |
| Homocysteine | 5-15 μmol/L | < 10 μmol/L |
How often: Annually.
9. Vitamin D (25-hydroxyvitamin D)
What it measures: Circulating vitamin D levels — critical for bone health, immune function, and testosterone production.
Why it matters after 40: An estimated 40-75% of adults are vitamin D insufficient. After 40, the skin becomes less efficient at synthesizing vitamin D from sunlight, and deficiency accelerates bone loss, weakens immunity, and may contribute to depression and fatigue.
Optimal range: 40-60 ng/mL (100-150 nmol/L). Below 30 ng/mL (75 nmol/L) is deficient; below 20 ng/mL (50 nmol/L) is severely deficient.
How often: Annually, ideally at the end of winter when levels are lowest.
10. Colonoscopy or stool-based screening
What it detects: Colorectal cancer and precancerous polyps.
Why it matters after 40: Colorectal cancer is the third most common cancer and second leading cause of cancer death in men. Screening has been moved earlier — the American Cancer Society now recommends starting at age 45 (40 if high risk). Colonoscopy is the gold standard because it both detects and removes precancerous polyps in the same procedure.
Screening options:
| Test | Frequency | Pros | Cons |
|---|---|---|---|
| Colonoscopy | Every 10 years | Detects AND removes polyps | Requires prep + sedation |
| FIT (fecal immunochemical test) | Annually | Non-invasive, at home | Misses some polyps |
| Cologuard (stool DNA) | Every 3 years | Non-invasive, higher sensitivity than FIT | Higher false positive rate |
When to start: Age 45 for average risk. Age 40 (or 10 years before earliest family diagnosis) if family history of colorectal cancer.
Screening schedule at a glance
| Test | Frequency | Starting age |
|---|---|---|
| Lipid panel (with ApoB) | Every 1-2 years | 40 |
| Metabolic panel (glucose, HbA1c, insulin) | Annually | 40 |
| CBC with differential | Annually | 40 |
| Comprehensive metabolic panel + liver | Annually | 40 |
| Thyroid (TSH + free T4) | Every 2-3 years | 40 |
| Testosterone (total + free) | Every 2-3 years | 40 |
| PSA | Per doctor recommendation | 40-50 |
| hs-CRP + homocysteine | Annually | 40 |
| Vitamin D | Annually | 40 |
| Colonoscopy or stool screening | Per protocol | 45 (40 if high risk) |
| Lp(a) | Once (lifetime) | 40 |
| DEXA for bone density | Per risk assessment | 50-70 |
| Coronary calcium score | Every 5 years if elevated risk | 40-50 |
How to read your results like a longevity expert
“Normal” doesn’t mean optimal
Lab reference ranges are derived from population averages — which include sick, sedentary, and metabolically unhealthy people. A result that falls within the “normal” range may still be far from optimal for longevity.
For example, a fasting glucose of 99 mg/dL (5.5 mmol/L) is technically “normal” but sits right at the prediabetic threshold. An ALT of 50 U/L is “within range” at most labs but is double what longevity physicians consider optimal.
Track trends, not snapshots
A single blood test is a snapshot. The real power comes from tracking values over time. A testosterone level of 450 ng/dL means something very different if it was 700 ng/dL three years ago versus if it’s been stable at 450 for a decade.
The PhenoAge shortcut
If you want a single number that synthesizes many of these blood markers, the PhenoAge algorithm calculates your biological age from 9 routine biomarkers. It’s the fastest way to see whether your overall blood panel is aging you faster or slower than your chronological age.
Functional fitness tests you can do at home
Blood tests tell you what’s happening inside. Functional fitness tests tell you how your body is performing. Both matter.
The 5 essential self-tests
| Test | What it measures | Benchmark (men 40-60) |
|---|---|---|
| Grip strength | Upper body and overall strength | > 80 lbs (36 kg) |
| Sit-to-stand test | Lower body power + cardiovascular | > 20 reps in 30 seconds |
| Single-leg balance | Balance and proprioception | > 30 seconds eyes closed |
| Walking speed | Overall vitality | > 2.8 mph (4.5 km/h) |
| VO2 max estimate | Cardiovascular fitness | > 35 mL/kg/min |
Each of these tests independently predicts all-cause mortality. Together, they paint a comprehensive picture of your functional age.
Health screening and biological age
Why screenings accelerate longevity gains
Here’s the mathematical reality: catching a disease 5 years earlier typically improves treatment success rates by 30-60%. For colon cancer, detecting and removing a precancerous polyp prevents the cancer entirely. For cardiovascular disease, knowing your ApoB and Lp(a) at 40 gives you decades to manage risk before an event occurs.
Screenings don’t just detect disease — they provide the data points needed to calculate and track your biological age. The blood markers from tests 1-8 on this list overlap significantly with the biomarkers used in PhenoAge and KDM biological age algorithms. Every annual blood panel is also a biological age measurement — if you know how to read it.
How SuperAge helps you track it all
SuperAge bridges the gap between lab tests and daily health tracking:
Blood test logging
Log your blood test results in SuperAge to track trends over time. The app highlights markers that are outside optimal ranges — not just lab “normal” — and shows how they’re changing year over year.
Daily vitals from Apple Watch
Between annual blood tests, SuperAge tracks daily cardiovascular markers that correlate with the same underlying health:
- Resting heart rate — declining RHR suggests improving fitness
- HRV — higher HRV indicates better autonomic function and lower stress
- VO2 max — the strongest single predictor of cardiovascular mortality
- Walking speed — the “sixth vital sign”
Biological age calculation
SuperAge synthesizes your wearable data, functional fitness tests, and blood biomarkers into a single biological age score. This gives you a clear, trackable number that tells you whether your health investments are paying off.
Frequently asked questions
I feel fine — do I really need all these tests at 40?
Yes. The most dangerous conditions after 40 — cardiovascular disease, type 2 diabetes, colon cancer, and prostate cancer — are silent in their early stages. “Feeling fine” is not a screening tool. The entire point of proactive testing is to catch problems before you feel anything.
How much will all these tests cost?
In the US, most of these blood tests are covered by insurance as part of an annual physical. Out-of-pocket, a comprehensive panel typically costs $200-400 at direct-access labs. Colonoscopy is covered as a preventive screening by most insurance plans. A coronary calcium score costs $75-200 out of pocket.
What if my doctor says I don’t need some of these tests?
Many primary care doctors follow guidelines designed for population-level screening, not individual optimization. Tests like ApoB, Lp(a), fasting insulin, and hs-CRP aren’t standard on most order panels but provide valuable longevity data. You can request them specifically, or use direct-to-consumer labs if your doctor doesn’t order them.
I’m under 40 — should I start earlier?
Establishing baselines in your 30s is ideal. At minimum, get a lipid panel, metabolic panel, and CBC in your mid-30s so you have comparison data when things start changing. Lp(a) should be tested once at any age — there’s no reason to wait.
What about the health checklist for women?
If you’re looking for a female-specific guide — covering mammography, cervical screening, hormonal assessments, and perimenopause testing — see the health checklist for women over 40.
Key takeaways
- 10 essential tests cover cardiovascular, metabolic, hormonal, and cancer screening — the major threats to men after 40
- “Normal” lab ranges aren’t optimal — longevity physicians use tighter targets for most biomarkers
- Track trends over time — a single snapshot is less valuable than year-over-year changes
- Functional fitness tests (grip strength, sit-to-stand, balance) predict mortality as powerfully as blood tests
- Lp(a) needs only one test — it’s genetically determined and the most commonly missed cardiovascular risk factor
- Early detection = more options — catching problems 5 years earlier dramatically improves outcomes
Take charge of your health today
Turning 40 isn’t the beginning of decline — it’s the beginning of informed health management. The men who age best aren’t lucky; they’re tested.
Ready to track it all? Download SuperAge and start integrating your blood tests, wearable data, and functional fitness into a single biological age score.
For a narrower decision guide, see Midlife health audit: what to measure before symptoms appear.
References
- Grundy SM et al. — “2018 AHA/ACC Guideline on the Management of Blood Cholesterol.” Circulation (2019)
- American Cancer Society — “Colorectal Cancer Screening Guidelines.” (2018, updated 2023)
- Harman SM et al. — “Longitudinal effects of aging on testosterone.” JCEM (2001)
- Ridker PM — “Clinical application of C-reactive protein for cardiovascular disease detection and prevention.” Circulation (2003)
- Levine ME et al. — “An epigenetic biomarker of aging for lifespan and healthspan.” Aging (2018)
- Studenski S et al. — “Gait speed and survival in older adults.” JAMA (2011)
Last updated: 2026-03-28. This article is regularly reviewed to ensure accuracy.
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