Nature's Harbor Glucosamine Chondroitin Complex is an equal blend of glucosamine and chondroitin sulfates. It is formulated without the use of preservatives, artificial flavors, or artificial colors. Glucosamine and chondroitin are two very important components necessary for cartilage formation, repair, and resiliency. The combination of glucosamine and chondroitin also promote joint flexibility and support joint tissue function. Plus 200 mg of Vitamin C.