Chondroitin Sulfate 400mg 120 tabs from Source NaturalsChondroitin Sulfate Support for Joint Tissue Chondroitin Sulfate (CSA) is a mucopolysaccharide found in cartilage, tendons and ligaments, where it is bound to proteins such as collagen and elastin. Current research indicates that supplemental Chondroitin Sulfate may help maintain proper joint function. Supplement Facts for 400 mg Serving Size: 2 tablets Amount %DV Chondroitin Sulfate 800 mg Yielding Approximately: N Acetyl Galactosamine 380 mg