Doctor's Best Hyaluronic Acid with Chondroitin sulfate? Biocell Collagen is a science based, clinically tested dietary ingredient that promotes active joints, youthful looking skin, and healthy connective tissues. The active ingredient, BioCell Collagen, helps maintain joint shock absorption and cushioning. And it helps maintain youthful skin by enhancing the structure and volume of the skin by promoting connective tissues. Hyaluronic acid is a type of building block called a glycosaminoglycan, and it plays an important role in supporting the structural strength of connective tissue and cartilage. Chondroitin sulfate is a chemical in cartilage around joints in the body. Doctor's Best uses Chondroitin sulfate with a purity of 90 percent or greater. Type II collagen is the collagen that makes up moveable joints. Studies have shown that hydrolyzed collagen provides a substantial advantage in bioavailability over non-hydrolyzed collagen, thereby having the potential to enhance healthy joint structure more efficiently.