Doctor's Best Hyaluronic Acid + Chondroitin Sulfate contains patented BioCell Collagen, a dietary ingredient that contains 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.