A small pilot study suggests that testosterone treatment is safe, well tolerated and may reduce symptoms, slow brain degeneration and increase muscle mass in men with relapsing-remitting multiple sclerosis, the most common form of the disease, according to a report in the May issue of Archives of Neurology, one of the JAMA/Archives journals.Multiple sclerosis is a progressive disease involving the immune and central nervous systems. MS and many other autoimmune diseases (in which the body attacks its own systems or tissues) are less common in men than in women, according to background information in the article. This is especially true during reproductive years. Sex hormones, including testosterone and estrogen, may be responsible for the difference. Testosterone has been shown to protect against an MS?ike condition and other autoimmune diseases in animals.>>> Discuss This Story