It's a crazy world out there, isn't it?  Why someone (and a doctor??) would do this, is beyond me since the results won't be as good .  It's like "shooting yourself in the foot."   But the bottom line is that you can't be sure.  If the result aren't lasting as long as you think they should, have a respectful discussion with your doctor first.  Then, if you're still not confident, consider switching doctors to see if the results are different.  Dr. I