Which blood tests should a man over 35 run every year?

The standard annual physical has not been updated in a generation. A primary-care visit at 38 typically pulls a basic lipid panel, a fasting glucose, a CBC, and a thyroid screen. That is a useful starting point. It is also missing the markers that actually predict how the next decade of your health goes.

This is the panel worth running every year. About a dozen markers, drawn once a year, that map cardiovascular risk, metabolic trajectory, hormonal status, and the slow-burn inflammatory signals that move before symptoms do.

Why annual labs matter more after 35

The pivotal decade for cardiometabolic disease is 35 to 50. Plaque is laid down silently. Insulin resistance develops a decade before glucose moves. Testosterone declines around 1 percent per year. None of this is visible in the mirror, and most of it is not visible to a clinician who is only looking at LDL and a fasting glucose.

Annual labs are not about catching disease. They are about catching trajectory. The numbers that matter are the ones that drift slowly.

What a complete annual panel looks like

The annual panel

• Lipid panel including ApoB. Standard lipids show you cholesterol concentration. ApoB counts the actual atherogenic particles that drive heart disease.
• Fasting insulin. Moves years before HbA1c does. The earliest signal of insulin resistance most clinicians do not order.
• HbA1c. Three-month average blood glucose. Useful, but not sufficient on its own.
• hsCRP. A high-sensitivity inflammation marker that independently predicts cardiovascular events.
• Ferritin. Iron storage. Doubles as an inflammation marker and a hemochromatosis screen.
• Vitamin D (25-OH). Low levels are nearly universal in northern latitudes and correlate with bone, immune, and cardiometabolic outcomes.
• Total testosterone, free testosterone, and SHBG. The three numbers needed to actually interpret androgen status, not just one of them.
• TSH and free T4. Subclinical thyroid disease is common after 40 and presents as fatigue, weight gain, and brain fog.
• Comprehensive metabolic panel. Kidney function, liver enzymes, electrolytes. Baseline organ health.
• CBC with differential. Blood counts and immune cell ratios. Anemia, infection, and hematologic disease screen.
• Lp(a), once in a lifetime. Genetic cardiovascular risk. Does not change. Measure it once, then act on the number.

What each marker actually tells you

The lipid panel including ApoB is the single most important cardiovascular number in the set. ApoB counts atherogenic particles directly. LDL cholesterol estimates the cholesterol carried inside those particles. The numbers disagree often enough that running only LDL is gambling.

Fasting insulin paired with HbA1c is the metabolic two-step. HbA1c flags overt diabetes and pre-diabetes. Fasting insulin flags the much earlier phase, where the pancreas is working harder to keep glucose normal. A normal HbA1c with an insulin of 14 is not a clean panel. It is an early warning.

hsCRP is the clearest read on chronic low-grade inflammation. A value under 1.0 mg/L is optimal. Between 1 and 3 is intermediate. Over 3 warrants a workup, because it doubles cardiovascular risk independent of cholesterol. The inflammation cluster is covered in the hsCRP, ferritin, and homocysteine piece.

Ferritin is doing two jobs. Low ferritin (under 30 ng/mL) is iron deficiency, common in endurance athletes and men with GI bleeding. High ferritin (over 300 ng/mL) is either inflammation or hemochromatosis, the most common inherited disease in men of European descent. Both directions need attention.

Vitamin D under 30 ng/mL is the modal finding for men who work indoors. The fix is cheap. Most men do not have it ordered.

Total testosterone tells you the headline number. Free testosterone tells you the biologically active fraction. SHBG tells you why the two numbers diverge. A man with total T of 600 and SHBG of 65 has very different physiology from a man with total T of 600 and SHBG of 25. Running only total testosterone is the most common diagnostic miss in primary care.

TSH and free T4 catch the subclinical thyroid disease that masquerades as midlife fatigue. Roughly 5 percent of men over 40 have a clinically actionable thyroid abnormality and do not know it.

The comprehensive metabolic panel and CBC are baseline organ-system checks. They rarely change management on their own, but they catch the outliers no one was looking for.

Lp(a) is the one-and-done marker. Levels are 80 to 90 percent genetically determined and do not respond to lifestyle. Over 50 mg/dL is elevated. Over 180 is high-risk territory. More in the Lp(a) piece.

What to do with the panel

A panel without interpretation is a stack of paper. A good read goes like this:

1. Read the panel against age-appropriate references, not just lab "normal." Lab normals are population averages. They include the unwell.
2. Flag the trajectory markers (ApoB, fasting insulin, hsCRP) for tighter follow-up.
3. Cross-reference hormonal and metabolic data. Low free testosterone with high SHBG and an elevated fasting insulin is a different protocol than low free testosterone in isolation.
4. Write the protocol against the markers, not against a symptom.

The annual rerun is the calibration. Numbers that move favorably stay in protocol. Numbers that stall trigger a change.

The bottom line

You cannot manage what you do not measure. The trend lines over years tell you more than any single draw.

The cheapest thing you can do for your future health is order the right panel and read it correctly.