Seven Seas JointCare Active has been specifically formulated to support an active lifestyle. It supports Cartilage, Bones, Muscles and Connective Tissue to help you in 4 important areas of JointCare. Plus Chondroitin. Specific Benefits: Cartilage: Vitamin C contributes to normal collagen formation for the normal function of bones and cartilage. Bones: Vitamin D contributes to the maintenance of normal bones. Muscle function: Vitamin D contributes to the maintenance of normal muscle function. Connective tissue: Manganese contributes to the normal formation of connective tissues. What is Chondroitin? It forms an important part of your cartilage where it helps retain water keeping the joint flexible.