A new study finds some Web sites advertising products containing Ephedra fail to disclose potential adverse effects of the supplement, and some make misleading statements about its safety and efficacy. The study is published in the August issue of Mayo Clinic Proceedings. Millions of Americans use dietary supplements containing ephedra to lose weight, build muscle and boost energy. It has been linked to some well-publicized cases, including the death of a 23-year-old Baltimore Orioles pitcher who died this year after taking an over-the-counter drug that contains ephedra as its primary ingredient. Dr. Bimal Ashar is a physician and assistant professor of medicine at The Johns Hopkins University School of Medicine. He's the senior author of the study, and he joins us on the line now.