download the appSign up to get the inside scoop on today’s biggest stories in markets, tech, and business — delivered daily. Read previewAn expert in healthy aging who claims to have reversed his biological age by 20 years shared his diet principles with Business Insider. Dr. Michael Roizen, an anesthesiologist and the chief wellness officer at Cleveland Clinic, is 78 years old. (It's important to note there is no consensus on the definition of biological age or how to measure it.) Here are the diet principles Roizen follows.

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Persons: —, Michael Roizen, Roizen, Valter Longo, He's, David Clancy, wasn't Organizations: Service, Business, Cleveland Clinic, US News, University of Alagoas, Longevity, gerontology, University of Southern California Longevity Institute, USC, Lancaster University, UK, BMI, BI Locations: Brazil