Vitamin and mineral supplements are popular, but do they make sense? Many people have been told that taking vitamins just results in expensive urine. Find out which vitamins really make a difference–you may be surprised. Dr. Tieraona Low Dog is one of the country’s leading experts on the evidence base behind herbs and dietary supplements. She knows how to overcome insomnia and anxiety without medications. Are there supplements that can boost the immune system against colds and flu? Is there value in mangosteen, hoodia, goji berries, black cohosh or milk thistle? Guest: Tieraona Low Dog, MD, Director of Education for the Program in Integrative Medicine at the University of Arizona, Clinical Assistant Professor in the Department of Medicine and Clinical Lecturer for the University of Arizona College of Pharmacy.