Verbatim response from Perplexity
The most useful blood biomarkers for longevity are the ones that predict hard outcomes like cardiovascular disease, diabetes, frailty, and all-cause mortality—not just “age” itself.[6][8] In practice, the strongest, most actionable markers are ApoB, HbA1c (and sometimes fasting glucose/insulin), hs-CRP, lipid markers, kidney function (especially creatinine/eGFR), and liver enzymes.[6][7][8]
A useful way to think about them is:
- ApoB: one of the best single blood markers for future cardiovascular risk, and therefore highly relevant to lifespan.[6][7]
- HbA1c: reflects average blood sugar over about 2–3 months; higher levels track with insulin resistance, diabetes risk, and worse long-term outcomes.[2][6][7]
- hs-CRP: a marker of chronic low-grade inflammation, which is linked to cardiovascular events and all-cause mortality.[3][6][7]
- Triglycerides / lipid profile: useful for metabolic and cardiovascular risk, though ApoB is generally more informative than LDL-C alone.[3][6][7]
- Creatinine / eGFR: kidney function is a strong general health signal; lower creatinine and better kidney markers were associated with centenarian status in one longevity study.[1][4]
- Liver enzymes like GGT, ALT, ALP, LDH: elevated values often signal metabolic stress or organ dysfunction; lower levels were associated with exceptional longevity in the centenarian study.[1][4]
- Uric acid: higher levels were associated with lower likelihood of reaching 100 in the centenarian analysis, and it also tracks with metabolic/inflammatory burden.[1][4]
- Iron status: in the centenarian study, higher iron and lower TIBC were associated with reaching 100, but this should be interpreted cautiously because iron biology is context-dependent.[1][4]
The newer longevity literature also points to broader blood-based aging panels such as epigenetic clocks and multi-marker “biological age” models, but these are more experimental than the core clinical markers above.[8]
If you want a short list to actually track, I’d prioritize:
- ApoB
- HbA1c
- hs-CRP
- Fasting glucose or fasting insulin
- Triglycerides
- Creatinine/eGFR
- ALT, GGT
- Uric acid
One important caveat: the centenarian study found associations with markers measured in people who later lived to 100, but that does not prove those markers cause longevity.[1][4] For example, the finding that higher total cholesterol and iron were associated with reaching 100 is interesting, but it does not mean “higher cholesterol is healthier” in general—ApoB and overall cardiovascular risk still matter more for most people.[1][6][7]
If you want, I can turn this into a ranked “best longevity blood panel” with target ranges and what each marker means.