Question: what is the 5 & 1 plan?
Answer: The Promise Medifast once offered the "5 & 1 Plan," in which you ate five Medifast meal replacements and one of your own meals for a weight loss of between 1 and 5 pounds weekly, and then the "3 & 3 Plan" in which you added in calories over 6 weeks with three meals and three meal replacements daily. That has changed.