Verbatim response from Claude
Key Blood Biomarkers for Longevity
Here are the ones with strong evidence:
Metabolic Health
- Fasting glucose & insulin (HbA1c) - insulin resistance is a root cause of many diseases
- Triglycerides/HDL ratio - better cardiovascular predictor than cholesterol alone
- ApoB - tracks harmful LDL particles more accurately than standard LDL
Inflammation
- hsCRP (high-sensitivity C-reactive protein) - chronic inflammation marker
- Homocysteine - linked to heart and brain disease
Organ Function
- ALT/AST - liver health
- eGFR/creatinine - kidney function
- Cystatin C - more accurate kidney marker than creatinine
Hormones & Nutrients
- Vitamin D - affects immune function, mood, bone health
- Testosterone/estrogen - decline accelerates aging
- IGF-1 - growth hormone proxy
Where to Get Tested
- Function Health (~$500/year) - Peter Attia-backed, tests 100+ biomarkers with physician review
- LabCorp or Quest - through your doctor, usually insurance-covered
- InsideTracker - includes personalized recommendations
- Marek Health - good for hormone-focused panels
Bottom Line
ApoB, fasting insulin, hsCRP, and HbA1c give you the most actionable information per dollar if you're choosing selectively.
Want recommendations on testing frequency or what to do with specific results?