What Is Hyaluronic Acid?

Hyaluronic acid is a naturally occurring sugar found in the body, composed of a long chain of carbohydrates, which are molecules that make up sugars and starches. HA is found throughout the body, where it serves a variety of roles. Since it holds moisture well, it is frequently found in areas in the body that require lubrication and pliancy, such as in synovial fluid, which reduces friction in certain joints. In the skin, HA is responsible for hydration and tissue repair.

The body replenishes hyaluronic acid, which breaks down over time, especially when exposed to ultraviolet radiation and other damaging environmental factors. As a person ages, however, the rate at which hyaluronic acid is replaced slows, leading to a gradual loss of the beneficial sugar. This leads to the skin drying out, wrinkles forming, and more significant cosmetic problems—especially when combined with the loss of collagen, elastin, and fat.

  • The hyaluronic acid used in Restylane®, Juvéderm® and other dermal fillers is a formulation based on the hyaluronic acid found in the body.
  • Once injected, the hyaluronic acid found in Restylane®, Juvéderm®, and other HA fillers serves to restore moisture and pliancy to where it has diminished. The physical volume of the injectable also brings a healthy fullness to the area.