Radiesse® is a cosmetic treatment that provides rapid visible results after the first treatment session. It is injected below the surface of the skin, and increases volume in areas that have fat loss. The primary ingredient is calcium hydroxylapatite (CaHa), which is a naturally occurring substance in our bones. CaHa has been used as a synthetic material in medical products for years. Your doctor will decide the number of treatments necessary, but significant restoration generally occurs with the first treatment.