CBC — Red Cell Mass
Hematocrit
Hematocrit is the percentage of blood volume occupied by red blood cells.
Reference range
Adult male reference: ~38.8–50%. Functional optimization context only — not a diagnostic assertion. Range varies by lab, age, and sex.
Why it matters
Hematocrit is the safety marker on any testosterone protocol. Testosterone stimulates erythropoiesis; persistently elevated hematocrit increases blood viscosity and warrants protocol adjustment, hydration review, and — when needed — therapeutic phlebotomy. REVRCEL members on hormone protocols have hematocrit re-read every quarter.
How REVRCEL clinicians read it
The protocol-safety marker on TRT. Quarterly re-read; act on persistent elevation.
Included in
- Core Bloodwork
- Hormone Optimization Panel
Common questions
Why does TRT raise hematocrit?
Testosterone stimulates red blood cell production (erythropoiesis). It is an expected effect that needs monitoring, not necessarily a reason to stop.
Related biomarkers
Statements have not been evaluated by the FDA. This page is educational and is not medical advice.