Medifast, Inc. operates as a health and wellness company through its subsidiaries, offering habit-based and coach-guided lifestyle solutions for weight loss in the United States. Its products include weight loss, weight management, and healthy living items such as bars, cereals, snacks, shakes, smoothies, soups, and supplements under the Essential Fuelings, OPTAVIA ASCEND, and OPTAVIA ACTIVE categories, along with daily nutrient packs. The company also provides lifestyle plans like the Optimal Weight 4 & 2 & 1 Plan, Optimal Weight 4 & 2 ACTIVE Plan, OPTAVIA Optimization Plan, and OPTAVIA GLP-1 Nutrition Support Plan, as well as metabolic synchronization. It markets products through an e-commerce platform. Formerly known as Healthrite, Inc., it changed its name to Medifast, Inc. in May 2001, was incorporated in 1980, and is headquartered in Baltimore, Maryland.