Medifast, Inc. (NYSE: MED) is an American nutrition and weight loss company based in Baltimore, Maryland. Medifast produces, distributes and sells weight loss and health-related products through websites, multi-level marketing, telemarketing, and weight loss franchise clinics. William Vitali, Doctor, founded Medifast in 1980. He sold his products directly to other doctors, who in turn prescribed them to their patients. The company is generally traded on the New York Stock Exchange (symbol: MED). On July 17, 1995, HealthRite (Medifast's predecessor) changed its name from Vitamin Specialties Corp. in 2001, the company changed its name to Medifast, inc. in 2002, established retired Marine Colonel Bradley T. MacDonald and the then Chairman of the Board of Directors, along with clinical specialist Dr. Wayne Scott Anderson, taking a shape for life as a personal trainer for the client system and the company's health system habits. In October 2010, Medifast was ranked #1in Forbes magazine's "Top 100 Small Business in America." The company ranked 18th from the 2014 list. Medifast was selected as one of forbes magazine's 100 most trusted companies in America in 2016 2017.In July 2017, Medifast changed the name of its subsidiary Take Shape for Life to OPTAVIA and introduced a new line of products, OPTAVIA Essentials, sold directly from trainers to customers. As of December 31, 2017 OPTAVIA's revenue for the ninth consecutive quarter of growth with a total of 16,700 active OPTAVIA Coaches.In October 2017, Medifast headquartered was transferred to Baltimore from Owings Mills, Maryland.In February 2018, Medifast announced the company's extension For its comprehensive health live programs and products to Hong Kong and Singapore in the first half of 2019 with its lifestyle brand, Optavia. The company has a market value of $1.4 billion, as of May 2018.