Nature’s Bounty Complete Protein & Vitamin Shake Mix is a delicious way to drink the nutrients you need most. Each serving contains protein, fiber, collagen, biotin, antioxidant vitamins C & E, calcium, vitamin D, electrolytes, probiotics, and more—to support a wide range of health factors including muscular, digestive, immune, bone, hair, skin, and nail health. (2) Enjoy mouthwatering Vanilla and Decadent Chocolate flavors pre- or post-workout, as a nutritious snack between meals, or any time of day you crave a tasty boost packed with protein and vitamins.