Natural Factors Glucosamine & Chondroitin Sulfate - 500 mg Glucosamine Sulfate & 400 mg Chondroitin Sulfate. A safe, effective, natural way to ease joint pain and promote healing of cartilage and connective tissue. Natural Factors Glucosamine & Chondroitin Sulfate is a combination of Glucosamine Sulfate, a potent, natural anti-inflammatory agent, known for its ability to help protect and rebuild cartilage tissue, and Chondroitin Sulfate, known and used extensively for its ability to inhibit enzyme break-down of cartilage tissue and joints, and to help rebuild cartilage tissue. Combined, these natural healers work synergistically to provide pain relief from damaged connective tissue, and powerful healing and maintenance properties that will help restore joint and cartilage health.