Joint Nutrients - 60 Capsules | Seeking HealthWho Needs Joint Nutrients? Your joints are a complex system of bone, muscle, cartilage, ligaments, and fluid. They give your skeleton its shape and help you to hop, skip, jump, and stand. When they are functioning optimally that is. With all these pieces involved and movements required, joints are susceptible to a number of issues. Pain, stiffness, and inflammation of the joints affect 1 in 4 American adults, and this number only increases with age.