Restylane® is a cosmetic dermal filler that adds instant softening of fine lines around the mouth to Dallas, TX patients. The main ingredient is hyaluronic acid, which is already naturally occurring in the body. In the human body, natural hyaluronic acid provides volume and fullness to the skin. After treatment with Restylane, the hydrophilic nature of the hyaluronic acid molecules allows them to bind many times their own weight in water as they slowly break down. This process helps maintain volume for about six months.