Osteo Bi-Flex Nutra Joint Drink Mix with Gelatin 11 oz with 7 Key Nutrients. To help maintain healthy Joints & Bones. Gelatin: Provides building blocks for collagen-the chief structural protein in cartilage and bone. Bone Nutrients: Calcium, Vitamin D, Zinc, Vitamin K, and Manganese. Supports Bone Health. Joint Nutrients: Vitamin C and Copper. Vitamin C is involved in cartilage formation. An Excellent source of Calcium and other important nutrients.