If you’re trying to live a healthy lifestyle, it can be confusing to know which advice to follow. Is bacon good or bad for you? Is your morning cup of coffee improving your health or derailing it? Should you avoid gluten or high-fat foods?

One of the nation’s top nutrition experts says you can’t go too wrong if you stick to the tried and true fundamentals of healthy eating. What are they? He reveals them in one simple sentence.

David Katz, M.D., is president of the American College of Lifestyle Medicine, an internationally renowned nutritionist and obesity expert and the founding director of Yale University’s Yale-Griffin Prevention Research Center.

He’s authored 15 books and hundreds of scientific articles in both Nutrition and Preventive Medicine and has been recognized as one of the 100 most influential people in health and fitness in the world for the past several years.

Dr. Katz shares the one key takeaway that experts and researchers around the world agree on. Plus, find out why a clinically trained doctor is so focused on using lifestyle as medicine.