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The Science Behind Medifast

The "Med" in Medifast

An approach to weight loss designed, used and recommended by doctors, Medifast was created in 1980 by William Vitale, M.D. His products were sold directly to doctors, who in turn prescribed them to their patients.

Since then, 20,000 physicians have prescribed or recommended Medifast, and over a million customers have used Medifast to lose weight quickly and safely - including doctors and their family members.

Today's Medifast is a synergistic combination of:
  • A physician-developed program for rapid, safe, and sustained weight loss
  • Low-glycemic, low-calorie foods scientifically formulated with the right balance of protein, carbohydrates, fiber, vitamins, and minerals

Real Doctors Recommend Medifast
Hear from some of the 20,000 doctors that not only recommend the Medifast Program, but have lost weight themselves.

Launch testimonial videos from doctors that recommend Medifast.


Scientific Advisory Board
The work of this cross-disciplinary group builds on Medifast's heritage of medically sound approaches to weight loss, and the incorporation of leading-edge clinical research into the company's products and programs.

Read more about the Medifast Scientific Advisory Board and its members.


More Clinical Research Using Medifast Products
Medifast uses both clinical research studies and retrospective analysis data from its Medifast clinics as the basis of its claim, "clinically proven."

See an overview of Medifast clinical research.