The panel that actually predicts healthspan

The annual physical you probably get is designed to flag acute disease. It checks whether you already have diabetes, whether your kidneys are failing, whether your cholesterol is high enough to be someone else's problem. It is not designed to tell you, at 42, how you are aging — or which lever to pull first if you want to push biological age down.

Longevity physicians work from a larger, mostly inexpensive, mostly routine panel that layers a few extra blood markers, a couple of physical performance tests, and a small set of imaging options. The panel is not exotic. The main change is what you ask for and how you interpret the numbers.

The metabolic panel

Insulin resistance is arguably the single most upstream driver of age-related disease. It precedes type 2 diabetes by 10–15 years, and it is already damaging the vascular lining, liver, and brain long before fasting glucose crosses any threshold. The key markers:

• Fasting glucose — useful but late. A "normal" glucose of 95 mg/dL (5.3 mmol/L) can still sit on top of insulin resistance.
• Fasting insulin — the earliest signal. Optimal is roughly 2–6 μIU/mL. Above 10 is where metabolic damage is already active.
• HOMA-IR (derived from glucose + insulin) — under 1.5 is optimal; over 2.5 is meaningful insulin resistance.
• HbA1c — a 3-month average of glucose. Optimal is ≤5.4%. Above 5.7% enters pre-diabetic range.
• Fasting triglycerides — a direct readout of liver metabolism. Under 80 mg/dL (0.9 mmol/L) is where longevity cohorts consistently land.
• Triglyceride-to-HDL ratio — under 2 (mg/dL units) or under 0.9 (mmol/L). One of the cleanest single-number windows into metabolic health.

Most people under 40 who are not already flagged for metabolic disease have never had fasting insulin measured. Adding it to one annual blood draw is probably the single highest-information-per-cost thing you can do.

The vascular panel

Atherosclerotic cardiovascular disease is the leading cause of death worldwide and the single largest driver of lost healthspan. The standard lipid panel (total, LDL-C, HDL, triglycerides) gets you partway there. The two markers that change the clinical picture are ApoB and Lp(a).

ApoB (apolipoprotein B)

Every atherogenic particle — LDL, VLDL, IDL, Lp(a) — carries exactly one ApoB molecule. ApoB is therefore a direct count of how many plaque-forming particles are circulating in your blood, which is mechanistically closer to cardiovascular risk than LDL-C. Most preventive cardiologists now target ApoB below 80 mg/dL for general longevity, and below 60 mg/dL for people with existing risk factors or family history.

Lp(a) (lipoprotein little a)

Lp(a) is a genetically determined lipoprotein that most people will carry at a stable level for life. Roughly one in five adults has an elevated Lp(a) and does not know it. High Lp(a) (>50 mg/dL or >125 nmol/L) doubles or triples early cardiovascular risk independently of everything else you do. It is worth measuring once. If it is high, you adjust every other vascular target more aggressively.

The inflammation panel

"Inflammaging" — chronic low-grade inflammation — is one of the most consistent mechanistic drivers of aging. Measuring it directly is imperfect but not hopeless:

• high-sensitivity CRP (hs-CRP) — optimal under 1.0 mg/L, and ideally under 0.5. Repeat 4–6 weeks apart when elevated, because acute infections transiently spike it.
• Fibrinogen — a complementary inflammatory marker and clotting factor.
• Ferritin — an acute-phase reactant. High ferritin with low iron saturation can indicate systemic inflammation (versus true iron overload).
• Neutrophil-to-lymphocyte ratio (calculated from a standard CBC) — a growing body of evidence links a ratio under 2 with better longevity outcomes.

The hormone and nutrient panel

A small set of hormonal and micronutrient markers have an outsized effect on how the rest of the biology behaves.

• Vitamin D (25-OH) — target 40–60 ng/mL. Deficiency (<30) is common and silently drags down bone, mood, and immune outcomes.
• Homocysteine — a marker of B-vitamin status and vascular risk. Optimal under 8 μmol/L.
• TSH + free T3/T4 — thyroid status filters almost every metabolic signal downstream. Subclinical hypothyroidism is easy to miss and easy to treat.
• Testosterone (men) and estradiol/progesterone (women, cycle-dependent) — endocrine context matters for sleep, muscle, mood, and cardiovascular trajectory.
• Omega-3 index — percentage of red blood cell fatty acids that are EPA + DHA. Optimal is >8%. Associated with lower all-cause mortality in large cohorts.

The physical function panel

Blood markers are half the panel. Two physical measures predict long-term mortality as well or better than any single blood test.

VO2 max

Cardiorespiratory fitness, expressed as VO2 max (ml/kg/min), is one of the single strongest predictors of all-cause mortality known. Moving from the lowest quintile into even the average range cuts mortality risk by roughly 50%. Modern wearables estimate it reasonably well from running/walking heart-rate data; a proper treadmill VO2 test is the gold standard if you want a hard number.

Grip strength

Grip strength — measured with a cheap hand dynamometer — is a surprisingly accurate proxy for total-body muscle quality and has independent predictive value for mortality in adults over 40. A $40 dynamometer and a note in a spreadsheet every six months is all the tooling you need.

Waist-to-height ratio

Waist circumference divided by height is a better proxy for visceral fat (the metabolically dangerous kind) than BMI. Below 0.5 is the widely used healthspan threshold; above 0.6 is a clear signal to intervene.

Selective imaging (once, in your 40s)

Two imaging tests are increasingly used by preventive cardiologists because they change decision-making more than any blood marker:

• Coronary calcium score (CAC) — a single low-dose CT that quantifies calcified plaque in the coronary arteries. A score of 0 is strongly reassuring; a score >100 is a clear call to aggressive lipid management.
• DEXA scan — measures body composition, visceral fat, and bone mineral density in one pass. Every 2–3 years is usually enough.

How to read the numbers

Two habits separate useful interpretation from box-ticking:

1. Do not chase "normal range." Lab ranges are defined by the population, and the population is not healthy. Compare your numbers to optimal longevity targets, not to what a standard PDF flags as red.
2. Track trends over time, not single values. Any single marker can move for dozens of reasons. A trend over 2–3 draws is a signal; a single outlier is usually noise.

Longevity Pulse ingests these markers, weights them against the evidence base, and turns the extended panel into a single biological-age estimate that updates as new values come in — which makes the trend visible at a glance and the next lever to pull obvious.

“Measuring the right things, regularly, is half the longevity work. The other half is responding to the numbers with something the body can actually adapt to.”

The bottom line

The gap between a standard annual panel and a longevity panel is not dozens of exotic tests. It is five or six additions — fasting insulin, ApoB, Lp(a), hs-CRP, omega-3 index — plus two physical measures and, once, a coronary calcium score. That list is unglamorous, inexpensive, and changes what you do next.

Measure, then respond. Trend, then adjust. The reason biomarkers matter for longevity is not the data itself — it is that the data tells you which of the other four or five levers actually deserves your attention this quarter.