Maroon uses four key diet principles to boost his health and longevity. AdvertisementAn 83-year-old doctor and triathlete who transformed his health in his 40s shared the diet principles he believes have helped him to live a long, healthy life . Artificial trans fats are made when vegetable oil is hydrogenated. They were commonly found in packaged, ultra-processed foods until the Food and Drugs Administration declared trans fats unsafe to eat in 2015. The FDA gave food manufacturers three years to remove trans fats from their products, so most foods no longer contain them.

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Persons: Joseph Maroon, —, Maroon, Dana Ellis Hunnes, Kristin Gillespie, Heidi Tissenbaum, It's Organizations: Service, University of Pittsburgh Medical Center, Aging Consortium, US News, UCLA Medical Center, Drugs Administration, FDA, University of Massachusetts Medical School