Question: How does an injectable filler of hyaluronic acid differ from collagen?
Answer: Our skin contains collagen protein fibers that are “swimming” in a Hyaluronic acid matrix normally. The older dermal fillers were collagen based. Some were animal collagen (cow or pig) and some were human collagen. They did not last very long and allergic reactions were common so testing was required with the animal collagens. Hyaluronic acid fillers like Restylane or Perlane or Juvederm are relatively newer and have a longer longevity and are now the main workhorse filler for most plastic surgeons and dermatologists.