You may be familiar with Hyaluronic Acid (HA) fillers like Restylane or Juvederm. Hyaluronic acid can be naturally found in our skin and body, and injectable HA is commonly used to reduce fine lines, and to restore or enhance facial volume. The effects are usually quite immediate. In contrast, Sculptra is a Poly-L-lactic Acid (PLLA) filler. PLLA is generally referred to as a bio-stimulating filler, meaning that it stimulates our own skin to produce collagen. Once injected, the PLLA is broken down into water and carbon dioxide over time. Unlike the rather immediate effects from injectable HA, the effects of injectable PLLA appear gradually over a few months and, as a result, produces gradual and natural effects.