I think it's a new class of hyaluronic acid fillers. Most hyaluronic acid fillers like Restylane or Juvederm are cross-linked. Normal hyaluronic acid is not cross-linked so it is constantly being created and destroyed by the body. Cross-linking makes the HA harder to break down, and that's why the filler is able to last for months as opposed to being quickly metabolized by the body like natural HA. Crosslinking turns HA from a liquid into a thick, viscous gel.
They use this uncrosslinked HA for procedures called mesotherapy, which is big in Europe but not in North America. It's basically using non-crosslinked HA to rehydrate the skin and to inject very superficially to help fine lines. If you injected this, it would dissipate quickly like the doctor said, which would solve the problem of more filler causing your face to look fatter and rounder.
Too bad he doesn't offer much of a discount for using just saline solution, but at least we know that it is possible with other substances
thanks for your reply. i did a bit of research on real self. its seems this type of filler is used on lips mainly as a lip enhancer. there was quite a few negative reviews on this. some claim the filler lasts months so im a bit confused since the filler is not supposed to be cross linked.
in my case im abit worried because i still have filler in my face and it has been 7.5 months since i had my last enerjet session. i wanna wait until the filler is re absorbed into my body before going ahead with third treatment. the great amount of volume added is a big turn off for me so this non crosslinked filler seems ideal. i wish enerjet didnt have this side effect its such a bummer. its great for those who dont mind having volume added to there face though.