Hyaluronic acid performs important functions in the body related to healthy skin. It regulates the hydration capacity, the metabolism and the regeneration capacity of the skin. Hyaluronic acid is usually found in the dermis, but the substance is also found in the epidermis. The substance retains a reserve of water in the dermis to prevent drying out of the epidermis and to maintain optimal water balance. Hyaluronic acid has a dynamic renewal of less than a day in the body.
For the big picture: Hyaluronic acid plays an essential role in maintaining healthy connective tissue, skin elasticity and wound healing. Hyaluronic acid also maintains flexibility in joints, blood vessels, and fibroids. The fibroblast is the main cell of connective tissue, a non-elastic fiber that keeps the skin firm.