
What bloodwork actually matters in your 40s
ApoB, ferritin, hormones, inflammation — the markers worth knowing, and how to read them.
DexaFit is a body composition and performance testing platform centered on DEXA scans, VO2 max, RMR, and related metrics that help users understand physical health, metabolism, and training response.
People who want more precise body composition, bone density, metabolism, and fitness data than a smart scale can provide.
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?
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.
Everlywell offers at-home health tests across hormones, heart health, food sensitivity, women’s health, men’s health, and general wellness.
DEXA and performance tests can be useful decision tools, but results should be interpreted in context, especially for bone health or metabolic concerns.

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.