Hi! I was wondering if the nurse who injects my juvederm (several times now for the past 2 months!) could be using something different than the juvederm? I don't get to see where she gets the product or what it looks like since I am lying down. The reason I ask this is because it seems like every time I get more juvederm, it looks like my lines are coming back and the filler is decreasing. I'm 39 years old and my lines (nasal labiofolds and near sides of mouth) were not that bad to begin with. Sorry for the long explanation....I'm just a little concerned. Thanks, Kris