When I got my first 3 HT's I still had a lot of native hair remaining, so any loss I had since then would be very difficult to say whether it was the native or transplanted hair that thinned (maybe a little bit of both?). My first strip was taken fairly high (as determined by Dr. Ron and Paul Shapiro) so if I did lose some transplanted hair it could be because of that. But I also have some retrograde alopecia, so if I lost transplanted hair it could because of that as well. Or maybe I didn't lose the transplanted hair at all and it was native... again, impossible to say with 100% certainty. But yes, I've been on Fin for 14 years and it has definitely helped my situation.