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Can a gluten-free lifestyle help defy aging?

Rock Center

The gluten free diet has become a massive food trend, bolstered by numerous celebrity endorsements, and a public desire to find a “magic bullet” to losing weight.  

Mark Sisson is a former marathoner and Ironman triathlete.  At 59, he looks and says he feels much younger. He credits his health to living a gluten-free lifestyle. 

Editor's Note: Josh Mankiewicz’s full report on the growing popularity of the gluten-free lifestyle airs Thursday, Oct. 4 at 10pm/9c on NBC’s Rock Center with Brian Williams.