Medifast, Inc. engages in the provision of healthy living products and programs. It offers the OPTAVIA brand, a lifestyle solution centered on developing new healthy habits through smaller, foundational changes called micro-habits. The firm's product line includes bars, bites, pretzels, puffs, cereal crunch, drinks, hearty choices, oatmeal, pancakes, pudding, soft serve, shakes, smoothies, soft bakes, and soups. The company was founded by William Vitale in 1981 and is headquartered in Baltimore, MD.