Looking for a place with safe ingredients for contouring injections!

I've been really worried about my double chin lately... but I'm too scared and cowardly to get facial contouring surgery.

So I looked into contouring injections... and they seem to be quite effective!!

Still, since I'm going to do it anyway, I think it's best to go to a safe and reputable place.

So I'm looking for a place with safe ingredients for the injections!! For those of you who have had contouring injections, which clinic did you go to?

Also, what kind of ingredients were used there?? I'm really curious.