Xylitol Bad? And 80 Hours Without Sleep (feat. Dean Karnazes) #727

Today: Is Your Sugar-Free Gum Raising Your Heart Attack Risk? The Xylitol Study Explained And... A throwback episode to when I hosted Dean Karnazes in front of a live audience in London.  TIME Magazine called him one of the "Top 100 Most Influential People in the World" He is a long-distance runner so impressive that Men's Fitness honored him as one of the fittest men on the planet. Even if you aren't angling to run a marathon (or run anything for that matter), Dean's got a lot to say on getting and staying motivated no matter what you're up against. He's also quite simply a very nice man, one of life's winners who's a good guy as well. Check out Dean's website www.ultramarathonman.com