No, WonderSlim is not the same thing as Medifast. While both are meal replacement programs designed for weight loss, they differ in several ways.  WonderSlim emphasizes portion control and healthy eating habits. At the same time, Medifast focuses on providing pre-packaged meals and snacks that are low in calories and nutrients.  Additionally, WonderSlim offers a wider variety of food choices than Medifast, giving dieters more flexibility in meal planning.  WonderSlim provides ongoing support and counseling to help dieters stick to their plan and reach their goals, while Medifast does not.