The 8 labs every man over 45 should run — and the ranges worth understanding.

The labs your primary-care doctor orders by default were designed to catch acute disease, not to show the trajectory you're on. Here's the panel worth asking for, what each marker tells you, and why 'normal' isn't always 'optimal.'

The 8 markers that matter

• HbA1c — a 3-month blood-sugar average; context matters more than the lab cutoff alone.
• Fasting insulin — the most-skipped, most-useful: it can climb for years while glucose still looks normal, flagging insulin resistance early.
• ApoB — counts atherogenic particles; a better cardiovascular predictor than LDL-C when the two disagree (Sniderman et al., JAMA Cardiology 2019).
• Total + free testosterone + SHBG — low T is diagnosed with two morning samples plus symptoms, not one number.
• hs-CRP — a systemic-inflammation marker linked to cardiovascular risk; if elevated, the question is why.
• Vitamin D (25-OH) — commonly under-replaced in midlife men; replacement is cheap and well-tolerated.
• Ferritin — men often accumulate too much stored iron; clinically elevated ferritin can raise CV risk.
• PSA + baseline exam — a baseline in your 40s gives a slope to monitor against.

What to do with the results

For most of these the levers are the same: sleep, resistance training, adequate protein, losing visceral fat, moderating alcohol, addressing sleep apnea (the protein and sleep principles apply to men too). The bloodwork tells you which lever to pull hardest. Bring the numbers to a clinician who works with preventive frameworks; 'you're fine' against a population range isn't the same as optimal for you.

Cadence

Annually after 45 for metabolic, hormone, and inflammation markers; every 2–3 years for a stable lipid panel; PSA per your clinician. A full panel is typically under ~$300 cash-pay.