Medifast, Inc. is an American nutrition and weight loss company based in Owings Mills, Maryland. The company owns five subsidiaries: Jason Pharmaceuticals, Inc. (Jason), Take Shape for Life, Inc. (TSFL) (renamed Optavia from July 2017), Jason Enterprises, Inc., Jason Properties, LLC and Seven Crondall, LLC. Medifast produces, distributes, and sells weight loss and other health-related products through websites, multi-level marketing, telemarketing, franchised weight loss clinics, and medical professionals. The company is public with a market capitalization of $405 million, as of October 2014.