Attorneys are beginning to see an increase in claims from men who used testosterone supplements and suffered harm or injury, particularly in light of the results of a study on testosterone therapy which were published in the Journal of the American Medical Association in November, 2013. This study linked testosterone to serious side effects, including heart attack, stroke and death. The FDA has approved testosterone therapy only for the treatment of men with low testosterone levels who also have a medical diagnosis of hypogonadism, an endocrine tumor, are undergoing chemotherapy, or have other recognized medical conditions related to low testosterone.