Doctor?s Best Hyaluronic Acid + Chondroitin Sulfate contains patented BioCell Collagen? a dietary ingredient that contains a patented composition of naturally occurring hydrolyzed collagen type II chondroitin sulfate and hyaluronic acid in a highly absorbable matrix.* It is standardized to contain no less than 10% Hyaluronic Acid 20% Chondroitin Sulfate and 60% Collagen Type II. Hyaluronic Acid and Collagen are vital structural components of skin that decline as we age and are partly responsible for the skin?s moisture suppleness and elasticity. BioCell Collagen? contains key components that can help support healthy skin and joint function.* At Doctor?s Best we lead with science. Our products are backed by research and crafted using pure ingredients carefully sourced from around the globe. Since 1990 we have dedicated ourselves to providing highly effective nutritional supplements that enable you to live a healthier lifestyle. We want nothing more than to see you and your family thrive!