The Study
Hepcidin is not essential for mediating testosterone's effects on erythropoiesis
This study tested if testosterone makes more red blood cells even when a specific protein (hepcidin) is missing in mice. It found that testosterone still boosted red blood cells — so maybe hepcidin isn’t the only way it works. But this was only in mice, and we can’t say testosterone definitely causes this — just that it’s linked to it in these special mice.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
Testosterone tells the body to make more red blood cells — and it doesn't need a protein called hepcidin to do it.
Where does this study sit?
Systematic Reviews & Meta-analyses
Max 100Randomized Trials
Max 90Cohort Studies
Max 72Case-Control
Max 58Cross-Sectional
Max 44Case Reports & Series
Max 30Expert Opinion
Max 513 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. Considered the gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — high red blood cell counts can thicken blood and raise clot risk in humans, making this relevant for testosterone therapy safety.
- 2Testosterone raised hemoglobin by ~20% and hematocrit by ~15% in mice without hepcidin or liver testosterone receptors.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Andrology
Year
2020
Authors
W. Guo, P. Schmidt, M. Fleming, S. Bhasin
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.