"There are several anecdotal case reports, small studies, and observational studies like ours which raise concern but do not provide conclusive evidence yet," Dr. Franklin D. Gaylis told Reuters Health.
The issue is a concern because prostate cancer is usually driven by testosterone.
"It is our belief that men, especially those with a family history of prostate cancer, should not receive a prescription for testosterone supplementation without careful, informed consultation regarding the risks and benefits of such treatment," the investigators conclude.
