The Art of Lip Injections
There really is no telltale sign that would reveal which filler was used just by looking. I think it is likely that one of the hyaluronic acid fillers (Juvederm or Restylane) was used. Regardless, this smooth, natural appearance can be achieved with one of these hyaluronic acid fillers, either of which would be my choice of filler for the lips. It is important that you find a physician with good technique that you are comfortable with and who will walk you through the after-care and expected post-injection course.