Longevity researcher Valter Longo is one of the world’s leading experts on fasting. He’s the director of the USC Longevity Institute and the author of The Longevity Diet. He’s known in part for his exploration of intermittent fasting and the five-day Fasting Mimicking Diet that he developed in kit form. Elise Loehnen asks him to break down the phenomenon of intermittent fasting and share the forthcoming science that he’s most excited about—the lifestyle interventions that could have massive impacts on how long we live and how healthy we are. (To learn more about the nonprofit organization that Longo founded and to donate to research on aging, age-related diseases, and integrative therapies for the prevention and treatment of major diseases, head to CreateCures.org.)

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