Metabolic — Insulin Signaling
Fasting Insulin
Fasting insulin reveals insulin resistance years before fasting glucose moves.
Reference range
Optimization target: <8 µIU/mL. Functional optimization context only — not a diagnostic assertion. Range varies by lab, age, and sex.
Why it matters
Fasting insulin is one of the most under-ordered and most predictive markers in longevity medicine. Insulin resistance precedes elevated fasting glucose by years; reading insulin alongside glucose is how clinicians catch metabolic dysfunction early enough to reverse it with lifestyle alone.
How REVRCEL clinicians read it
Always read with fasting glucose. HOMA-IR can be calculated for a single-number summary.
Included in
- Core Bloodwork
- Metabolic Panel
Common questions
Why test fasting insulin and not just glucose?
Insulin resistance shows up in insulin years before glucose moves. Glucose-only screening misses the early window.
Related biomarkers
Statements have not been evaluated by the FDA. This page is educational and is not medical advice.