Nestle HealthScience. Nutritionally complete meal replacement (The use of Optifast products as a sole source of nutrition is intended for individuals who are participating in the comprehensive Optifast program which includes medical supervision, lifestyle education and ongoing personalized support. For individuals who are participating in the comprehensive Optifast program, the meal replacement products provide complete nutrition in 5 servings per day). Sweetened with non-nutritive sweeteners. Suitable for lactose intolerance. Maintain an adequate daily fluid intake.