Support healthy bones and joints with Vital Proteins Cartilage Collagen. Sourced from grass-fed and pasture-raised cattle, Cartilage Collagen delivers 3 g type II collagen plus glucosamine and chondroitin. Type II collagen helps to maintain cartilage integrity which can promote joint comfort and mobility. Collagen also supports strong bones and muscles, both of which contribute to healthy joints. Cartilage Collagen includes glucosamine and chondroitin, types of glycosaminoglycans that lubricate and cushion joints.