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Medifast makes no claim that these results are representative of all participants on the Medifast Program. Medifast recommends you consult with a physician before starting a weight-loss program. Medifast is the brand recommended by more than 20,000 doctors since its founding.
Shikany, J. M., A. S. Thomas, T. M. Beasley, C. E. Lewis and D. B. Allison (2013). "Randomized controlled trial of the Medifast 5 & 1 Plan for weight loss." Int J Obes (Lond) 37(12): 1571-1578. View Study