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.