Promote cartilage and joint function with Mason Natural’s Collagen 1,500 with Vitamin C. Collagen 1,500 with vitamin C aids in cartilage and joint function with its enriching formula of hydrolyzed collagen, vitamin C, calcium and biotin. Collagen 1,500 with Vitamin C also supports healthy hair, skin and nails, while it strengthens the body's main structural protein, collagen. Take a 3-capsule serving a day with your favorite meal at the time of your choosing and let Collagen 1,500 with Vitamin C get to work.