I used the non-RX regimen for about 4--5 wks prior to seeing my derm.She was able to get me in before the 2 month time period I thought I'd have.Since I took Dr.B's book with me to my appt.,I discussed my *test results*,showed my scores and what I typed as.Then told my derm what products I was using.I was then given samples of Renova .02%,told to use pea-size nightly,then come back in 2-4 weeks and let her check my skin.I tolerated the .02% with just a bit of tightness/one underground zit,(not sure what caused it) in the beginning,and other than it not going on easily,I had no issues to speak of.Being the impatient person that I am,when I went back to my derm,I asked her to let me sample the .05% and she was fine with it.She told me that even tho I felt I was an OSPW,looking at my skin,I was an ORNT in her opinion.SO,my question,and yes,I really was getting to it,can you change skin types and if so,do you go ahead and try products for the skin yours has become or continue with your present type so it doesn't revert back? hope this made sense.