Source Naturals Liquid Glucosamine Chondroitin 1500 mg/1200 mg utilizes a specific combination of ingredients in a pleasant tasting and highly assimilable liquid form to maximize joint health. Glucosamine and chondroitin sulfates are the metabolic precursors of normal cartilage. Recent studies have demonstrated that glucosamine and chondroitin sulfate can act synergistically to lubricate joints, and nourish cartilage and connective tissue.