Medifast and Optavia aren’t the same. Optavia is, basically, a subsidiary of Medifast. Medifast is the umbrella company that includes Optavia. From what I could gather in my research, Medifast was kind of the business structure that supports Optavia. If you’re going the Medifast/Optavia route for the sake of weight loss, you’ll likely be dealing more with Optavia than with Medifast – as it’s the site with the meals, the programs, and the access to the coaches.