Hyaluronic acid (HA) Fillers can help stimulate natural collagen production. Hyaluronic acid is a natural product and a major component of our skin. Hyaluronic acid is hydrophilic (water absorbing) and known to keep moisture locked in the skin. Dermal fillers are an excellent way for non-surgical volume restoration for different parts of the body, including the labia, for cosmetic gynecological procedures.