THE HORMONE BLOODWORK FIELD GUIDEEditorial standards →

WIKI / INTERMEDIATE

Hematocrit and CBC

What “crit” means, why it rises on TRT and when to call.

Look at the CBC and the trend

Hematocrit is the share of blood volume made up of red cells. Testosterone can raise it. Bring the trend, hemoglobin, your treatment history and any sleep apnea or breathing concerns to your clinician.

Know the action threshold

Contact your prescriber promptly at 54% or higher. The Endocrine Society uses a hematocrit above 54% on TRT as a trigger for clinician-directed intervention and evaluation for causes such as hypoxia or sleep apnea.

Ask before donating blood

Discuss whether a repeat draw, further evaluation or a supervised intervention is appropriate. Donation alone can leave the underlying cause unaddressed.

Sources

Bring the right question to your next draw.

Check the marker, testing method and current price before ordering.

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