OPTAVIA's Fuelings and plans have been scientifically-developed to help you achieve a healthy weight. We work with a cross-disciplinary Scientific Advisory Board comprised of physicians and scientists who help guide our portfolio of offerings. Our scientifically proven plans and our products were developed by physicians, dietitians and scientists, and have been used by more than 1 million Clients.
OPTAVIA's Fuelings are nutritious, delicious, and effective. They're scientifically designed to provide the right nutrition at every stage of your journey, and are nutrient dense, portion controlled, and nutritionally interchangeable.
A distinguished Scientific Advisory Board
The role of our Scientific Advisory Board is to continually review the effectiveness, safety, and nutritional benefits of our products and programs. Our Scientific Advisory Board is composed of a distinguished panel of scientists and physicians from leading universities across the United States.
The work of this cross-disciplinary group builds on our heritage of a medically sound approach to healthy living and the incorporation of leading-edge, clinical research into the company's products and programs.
Lawrence Cheskin, MD
Medifast Scientific Advisory Board Chairman Associate Professor of Health, Behavior and Society, Johns Hopkins Bloomberg School of Public Health, and Director, Johns Hopkins Weight Management Center
Simon Barquera, MD, PhD
President of the Nutrition Board of Professors at the Mexican School of Public Health and Director of Research on Nutrition Policies and Programs, National Institute of Public Health
Susan Barr, PhD, RD
Professor, Food Nutrition and Health, University of British Columbia
George Bray, MD (not pictured)
Boyd Professor Emeritus and Professor of Medicine Emeritus at the Pennington Biomedical Research Center, Louisiana State University
John Foreyt, PhD
Professor, Department of Psychiatry and Behavioral Sciences, Department of Medicine, Baylor College of Medicine
Steven Heymsfield, MD
Professor and Chair, Pennington Biomedical Research Center, Louisiana State University
Mark Messina, PhD (not pictured)
President, Nutrition Matters and Adjunct Associate Professor, Department of Nutrition, School of Public Health, Loma Linda University
Sylvia B. Rowe
President of SR Strategy and Adjunct Professor at Tufts Friedman School of Nutrition Science and Policy and University of Massachusetts, Amherst
On our Optimal Weight 5 & 1 Plan® your body enters a gentle but efficient fat burning state. Choose from convenient, nutritionally interchangeable, scientifically-designed Fuelings. Each Fueling contains high-quality protein, which helps retain lean muscle mass. In addition to Fuelings each day, you’ll learn another healthy habit: how to make a Lean & Green meal for you and your family. When you know what optimal nutrition looks like, healthy eating becomes second nature.
Whether your goal is to achieve a healthy weight or to sustain your optimal weight and healthy lifestyle, our plans have got you covered. Work with your OPTAVIA Coach to choose the right path.
"I owe my success to the OPTAVIA program and community, which provides an unbelievable support system and allows me to fuel my body every 2-3 hours, I'm honestly never hungry!"
"I love this program so much and I want other people to feel that hope. I want them to know that no matter how high you think your wall is, you can climb it with this program."
"What I know now that I didn't know four years ago expanded my world. I can fight the emotional aspects of overeating now. I can get up and move."