
What to track first if you actually want to optimize healthspan
The short list of signals that move the needle — and the ones safe to ignore for now.
ZOE is a personalized nutrition platform built around gut health, metabolic response, and food scoring to help users understand how food choices may affect their body.
People who want personalized nutrition guidance connected to gut health, metabolic response, and food choices.
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?
Levels helps users understand how food, sleep, exercise, and stress affect metabolic health.
Nutrisense pairs glucose data with nutrition coaching to support metabolic health and behavior change.
Nutrisense pairs glucose data with nutrition coaching to support metabolic health and behavior change.
Signos combines CGM data and app-based guidance to help users understand glucose response and metabolic health.
Virta Health offers nutrition-first metabolic care focused on sustainable weight loss and type 2 diabetes reversal/remission support.
Personalized nutrition is still an evolving field. Users should avoid overinterpreting food scores and should consult a clinician for medical nutrition concerns.

The short list of signals that move the needle — and the ones safe to ignore for now.

A direct comparison of recovery, strain, sleep, and fitness signal — without the influencer noise.

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