When it comes to your overall health and wellness, it can be difficult to know what's necessary and what's not. Dr. Oz talks with Dr. Nancy Snyderman, author of Medical Myths That Can Kill You: And the 101 Truths That Will Save, Extend, and Improve Your Life, and Dr. Nortin Hadler, author of Worried Sick: A Prescription for Health in an Overtreated America, about the truth and myths of diseases and preventative measures. Dr. Snyderman and Dr. Hadler discuss such medical issues as annual checkups, mammograms, prostate cancer screenings, colonoscopies and vitamin supplements.