
What bloodwork actually matters in your 40s
ApoB, ferritin, hormones, inflammation — the markers worth knowing, and how to read them.
Tally Health is a consumer biological age platform using at-home testing and personalized recommendations to help users understand and track cellular aging signals.
People interested in biological age testing, cellular aging insights, and behavior changes tied to longevity tracking.
These are editorial signals, not endorsements. Always pair with qualified medical guidance.
A short due-diligence list to apply before paying, booking, subscribing, or building a routine around any longevity tool, test, or program.
What exactly will this measure, track, or improve — and over what time horizon?
Is there medical or clinician oversight, and how qualified are the people behind it?
How should I interpret the data, and what does a meaningful change actually look like?
What will I do differently with the results? If the answer is unclear, the signal isn't useful yet.
Is the claim evidence-led or marketing-led? Where is the underlying research?
What is the true cost after the first purchase, test, or subscription — including renewals?
Does this replace medical advice? It should not. Where does professional care still belong?
How does this compare to simpler, lower-cost, or higher-evidence alternatives?
DexaFit offers DEXA body composition scans, VO2 max testing, RMR testing, and related health metrics.
Ezra offers full-body MRI screening aimed at detecting potential cancer and other abnormalities.
Prenuvo offers whole-body MRI screening and related imaging insights for proactive health assessment.
10X Health offers precision health testing, genetic testing, and optimization-oriented wellness programs.
Elysium Index is an at-home biological age test positioned around epigenetic aging analysis.
Biological age testing is an emerging area. Results may be motivational, but users should not treat them as diagnosis or proof that aging has slowed.

ApoB, ferritin, hormones, inflammation — the markers worth knowing, and how to read them.

What each test really tells you — and where the marketing outruns the science.