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According to investigators, prostate cancer developed in 20 men within months to a few years after they began testosterone supplementation to correct a deficiency of the hormone.

"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

According to investigators, prostate cancer developed in 20 men within months to a few years after they began testosterone supplementation to correct a deficiency of the hormone.

"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

According to investigators, prostate cancer developed in 20 men within months to a few years after they began testosterone supplementation to correct a deficiency of the hormone.

"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