Seven Seas JointCare + Collagen is a 30-day duo pack of food supplements: 30 JointCare capsules with omega-3 fish oil, glucosamine and chondroitin, plus vitamins C and D, zinc and manganese, and 30 collagen tablets. Vitamin C contributes to normal collagen formation for the normal function of cartilage and bones. Vitamin D contributes to the maintenance of normal bones and normal muscle function. Manganese contributes to the normal formation of connective tissue. Food supplements should not be used as a substitute for a varied diet and a healthy lifestyle.