For men with low testosterone, taking testosterone therapy might slightly raise the number of red blood cells, but it doesn’t seem to make blood clots or lung blockages any more likely over almost two years of use.

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Evidence from Studies

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Cardiovascular safety of testosterone therapy—Insights from the TRAVERSE trial and beyond: A position statement of the European Expert Panel for Testosterone Research

Narrative Review

2026 Jan

This study looked at men taking testosterone to fix low testosterone levels and found that while their blood thickens a little (higher hematocrit), it doesn’t raise their risk of dangerous blood clots like DVT or pulmonary embolism — which is exactly what the claim says.

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Source Study

Cardiovascular safety of testosterone therapy—Insights from the TRAVERSE trial and beyond: A position statement of the European Expert Panel for Testosterone Research

Score: 1

DOI: 10.1111/andr.70062

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