Dallas Hartwig is the cofounder of the Whole30 and Whole9 diets, as well as the coauthor of the New York Times best-selling books It All Begins With Food and The Whole30. He's a functional medicine practitioner and physical therapist who also cohosts The Living Experiment podcast and writes a popular healthy living email weekly. He's appeared on Today, Good Morning America, The Dr. Oz Show, The View, and other shows. Visit DallasHartwig.com for additional information.