Ensure has a mix of what matters. Each Ensure Original nutrition shake is designed to give you strength and energy from a specialized nutrition blend that’s both complete AND balanced. Ensure Original shakes have key nutrients to support immune health, such as protein, vitamins A and D, zinc, and antioxidants. This formulation of Ensure Original is available only at Costco and has the nutrition you want every day. And it contains nutrients that support collagen production for bone and muscle health. Our great-tasting Original Milk Chocolate and Vanilla shakes make the perfect meal replacement. Ensure is the #1 doctor-recommended brand for adult nutrition shakes.