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:  The effects of smoking marijuana on the human brain, particularly in terms of memory and IQ. The five things Pence, Price and Ryan agree on in terms of upcoming changes to healthcare in the U.S. The healthiest things every 45-year-old should do. Women with chronic illness are missing critical information due to lack of an online presence. Concussions should be assessed by using multiple scans.  It's never too late to quit smoking (even in your 60s) in order to slash risk of early death. Bonus! 9 Unexpected Ways Winter Could Be Hurting Your Health