Verbatim response from ChatGPT
Short answer: it depends on what you want to track. For most people who want ongoing, clinically useful longevity tracking with personalized recommendations, a combo of InsideTracker (blood-based biomarker + coaching), TruDiagnostic (epigenetic/“biological age” testing), and a data-aggregation tool like Heads Up Health is the best practical setup. If you prefer a clinician-led membership that includes labs, consider Parsley Health. If you want a lower-cost at-home subscription, LetsGetChecked or Everlywell are options.
Why those picks (quick bullets)
- InsideTracker — Best all-in-one longevity-focused blood testing + algorithmic interpretation and action plan. Covers important biomarkers (lipids, glucose/HbA1c, insulin, CRP, vitamin D, hormones, IGF-1 where appropriate), offers personalized nutrition/exercise/supplement guidance, and supports repeat testing to track changes.
- TruDiagnostic — Best consumer option for epigenetic (DNA methylation) age testing. If you want to measure biological age (methylation clocks) and track its change over time, TruDiagnostic is a leading lab used by researchers and longevity enthusiasts.
- Heads Up Health — Best for aggregating lab results, wearable/device data, and plotting trends over time across different providers. Useful if you get tests from multiple labs or want consolidated dashboards.
- Parsley Health — Best for a clinician-driven membership (MD/NP + functional-medicine approach) where labs are ordered and interpreted in the context of ongoing care and lifestyle medicine.
- LetsGetChecked / Everlywell — Best for simple, lower-cost at-home test subscriptions (hormones, basic metabolic panels, vitamin D, etc.) when you want convenience rather than deep personalization.
- SpectraCell (Micronutrient testing) — If you care especially about micronutrient status, SpectraCell’s micronutrient panel is one of the more thorough options.
How to choose
- Goal: If your main goal is to lower cardiovascular/diabetes risk and improve metabolic health (the biggest longevity drivers), prioritize services that track fasting glucose/HbA1c, fasting insulin, lipids (including ApoB if available), hs-CRP, blood pressure, and liver/kidney function. InsideTracker excels here.
- Biological age vs clinical biomarkers: If you want an “age clock,” add epigenetic testing (TruDiagnostic).
- Ongoing care: If you want a clinician to interpret results and adjust therapies, pick Parsley Health or a functional-medicine subscription that includes lab ordering.
- Budget: At-home tests (LetsGetChecked, Everlywell) are cheaper but don’t usually provide the same depth of interpretation or long-term coaching.
Which biomarkers to track for longevity
- Lipid panel (consider ApoB and Lp(a) if available)
- Fasting glucose and HbA1c, fasting insulin
- hs-CRP (inflammation)
- Vitamin D, B12, folate
- Comprehensive metabolic panel (liver/kidney)
- Thyroid panel, sex hormones (age/sex-dependent)
- IGF-1 (age-related cancer/growth signaling relevance)
- Micronutrient panel if suspected deficiency
- Epigenetic/methylation age (if using TruDiagnostic)
- Optional: telomere length (limited utility), advanced lipoprotein testing (NMR), homocysteine
Practical tips
- Use the same lab or service for repeat tests wherever possible to reduce analytic variability.
- Test fasting for insulin/glucose-related measures and at consistent times for hormones.
- Track lifestyle data (sleep, activity, diet) alongside labs—Heads Up Health helps here.
- Work with a clinician when making medication or supplement changes based on labs.
If you want, tell me:
- your age, sex, budget, and whether you prefer at-home kits vs clinician-ordered labs, and I’ll recommend the single best membership/package for your situation and a testing cadence.