Researchers find testosterone hormone therapy for transmasculine individuals is safer than previously thought

A common concern about gender-affirming hormone therapy for transmasculine people is the risk of red blood cell volume changes and erythrocytosis, a high concentration of red blood cells, with the use of prescribed testosterone. However, Mount Sinai researchers have found that testosterone treatment may be safer than previously reported, with results published in The Journal of Clinical Endocrinology and Metabolism.