Facial fillers are products such as collagen, hyaluronic acid and calcium hydroxyl apatite that rejuvenate facial skin by reducing or eliminating wrinkles, raising scar depressions, enhancing lips and replacing soft-tissue volume loss through facial injections. With age, our skin becomes more susceptible to wrinkles and sagging. Exposure to sun and years of muscle movement ( squinting, chewing, smiling ) contribute to tissue breakdown of the skin.