Every week, Dr. Roizen discusses the latest health headlines YOU need to know.In this episode, Dr. Roizen talks about the latest health headlines that YOU need to know, including the following topics:  Kids on the playground get smarter. Polyunsaturated fats lower risk of heart disease and stroke when replacing saturated fat. FDA moves to prevent pharma from raising prices. Many Americans are taking too much vitamin D -- true or false? Overweight during pregnancy increases risk of birth defects. Lone star tick bites can induce a rare meat allergy.  Who really needs to be gluten-free? How you can avoid a liver cancer death. PLUS so much more... Bonus! Big Benefits from One Hour of Exercise