any clinic that claims
HA is in some way permanent kind of undermines their credibility IMO. any facial plastic surgeon, and there are thousands, will tell you there isn't a permanent effect (realbody.com has innumerable surgeons and customers comments who have had facial fillers) and the face is less 'mobile' than the penis, by which i mean you dont hammer your
HA filled cheeks or wrinkles like you do your penis when its 'in use'
if you know what i mean.
not to say that different
HA based fillers dont have different lifespans, they vary massively, but nothing reliably much over 18 months at best. aside from
Ellanse E which supposedly lasts up to 4 years and 'stimulates collagen production', although i reserve judgement on that until i see some proper research not marketing blurb from a manufacturer trying to flog me their product !