Biomarkers worth tracking for healthspan, not just lifespan
Which numbers tell you how well the next decade is likely to go, and why a normal annual panel usually misses them.
Key takeaways
- Healthspan markers describe function. Most annual panels describe the absence of diagnosis.
- Fasting insulin and HOMA-IR usually drift before fasting glucose does, which is why they are worth measuring early.
- ApoB is a more precise cardiovascular risk marker than total cholesterol or LDL-C alone.
- Biometrics like VO2 max and grip strength predict outcomes as well as many blood markers.
Lifespan asks how long. Healthspan asks how much of it you spend functioning well. The markers that predict the second question are not always the ones on a standard annual panel.
Fasting insulin and HOMA-IR show metabolic drift years before glucose moves. ApoB describes cardiovascular risk more precisely than total cholesterol. hs-CRP tracks the low-grade inflammation that sits underneath most chronic disease.
Alongside blood work, simple biometrics carry weight: grip strength, VO2 max, resting heart rate, and body composition all track function rather than diagnosis.
A reference range describes a population that already includes unwell people. Optimal is a narrower, more useful target, and it is the one we work against.
Normal is not the target
Reference ranges are built from population data that already includes people on a decline curve. Sitting inside one means you are not an outlier in a broadly unhealthy population. It does not mean the system is performing well.
Optimal ranges are narrower and are the ones worth working against when the goal is prevention rather than diagnosis.
The blood markers that carry the most signal
- Fasting insulin and HOMA-IR: the earliest reliable read on metabolic drift.
- ApoB: counts the atherogenic particles rather than estimating the cholesterol inside them.
- hs-CRP: low-grade inflammation, which sits underneath most chronic disease.
- HbA1c alongside fasting glucose: a three-month average rather than a single morning.
- Omega index and vitamin D: two of the most correctable numbers on any panel.
Function markers people skip
VO2 max is among the strongest single predictors of longevity available, and unlike most predictors it is trainable at any age. Grip strength and lean mass track the same underlying reserve.
Resting heart rate and heart rate variability, read as personal trends rather than absolute scores, often flag accumulating strain before anything shows in blood work.
How often to test
Twice a year is enough for most people who are stable, and quarterly during an active protocol when something is being changed on purpose. Testing more often than a marker can move produces noise, not information.
What this means for you
Ask for fasting insulin, ApoB, and hs-CRP the next time you have blood drawn. Those three answer more about the next decade than anything else on a standard panel.