CBC — Red Cell Mass

Hematocrit

Hematocrit is the percentage of blood volume occupied by red blood cells.

Reference range

Reference ranges vary by lab, age and sex. Your own lab report carries the authoritative range, and your clinician reads it with you.

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

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

Total Testosterone

Statements have not been evaluated by the FDA. This page is educational and is not medical advice.

First Orders · This Month

50% off your first month.

Apply code PEPTIDE50 at checkout for half off the first month of an eligible peptide or weight-loss protocol. Treatment begins only if a licensed clinician in your state approves it after reviewing your intake.

One use per customer, first order only, 1-month plan only. If a clinician does not approve treatment, you are refunded. Compounded medications are not FDA-approved.