Why Are My Red Blood Cells High On Testosterone?
Timeline
Video Summary
A 50-year-old man on testosterone asks about elevated red blood cells, iron deficiency, and mildly high AST. Dr. O’Connor explains that 400 mg of testosterone weekly plus Deca can strongly stimulate red blood cell production and describes this as androgen-induced erythrocytosis rather than polycythemia vera.
The discussion focuses on how repeated blood donation or phlebotomy can progressively deplete ferritin and iron stores even when hemoglobin and hematocrit remain elevated. Dr. O’Connor also stresses that iron deficiency should not automatically be blamed on phlebotomy because gastrointestinal blood loss and other causes may still require evaluation.
His mildly elevated AST is discussed separately because AST can rise from muscle activity, alcohol, medications, or other sources and is not specific to liver injury. Dr. O’Connor ultimately recommends reducing excessive androgen exposure, reviewing complete iron studies, reassessing liver enzymes, and using the ABCDs™ to evaluate cardiovascular, kidney, hematologic, and metabolic risk.
Drug Callouts
Condition Callouts
Key Takeaways
- High-dose testosterone and nandrolone can strongly stimulate red blood cell production and contribute to androgen-induced erythrocytosis.
- Repeated phlebotomy can lower ferritin and iron stores even when hemoglobin and hematocrit remain elevated.
- Androgen-induced erythrocytosis should be distinguished from polycythemia vera because they are different hematologic conditions.
- Iron deficiency in a man on testosterone should still prompt consideration of gastrointestinal blood loss and other causes beyond repeated blood donation.
- A mildly elevated AST can come from muscle activity, alcohol, medications, supplements, or liver disease and should be interpreted in context.
- Dr. O’Connor recommends reducing excessive androgen exposure and reviewing complete iron studies, cardiovascular risk, kidney health, and the broader ABCDs™.