Hyaluronic Acid is a jelly-like substance that functions as a lubricant and as a cushion and is most prevalent in the joints, eyes and skin. The Hyaluronic Acid used in this formula comes from microbial fermentation and Vitamin C has been added to Enhance enhance its absorption. Both Glucosamine and Chondroitin have been studied worldwide for their roles in joint health. Glucosamine assists the body's tissues by producing proteoglycans. Proteoglycans are an integral part of collagen and are important in maintaining healthy joint flexibility and resilience. Chondroitin Sulfate is also an important building block for cartilage.