I would think anything your hair is presently liking would be fine to use. When I was going to JC Penny's Salon I had DRC treatment, Dudley's Hair Rebuilder, L.U.S.T., (all I can remember presently)used on my hair. When I went to an Egyptian owned spa the stylist did a combo of conditioners (not sure of...Temme...(sp), Keracare, etc. were on her back board) on my hair that included an oil (in unmarked bottle). So have fun with it try the ORS and let us know how it goes for you.
