Simply Mix in Protein and Calories With a milk-based powder that tastes great, and adds real nutritional heft. Shop Product Types Protein & Calorie Mixes Conditions Featured Products All Multi Mix™ Products Multi Mix™ Calorie & Protein Supplement Mix Select options Use the Food First Approach MULTI MIX™ is the original food first intervention to combat unintended weight loss. MULTI MIX™ adds calories and proteins to foods while enhancing the flavor. This versatile option is great alternative to between meal supplements.