4b relaxed and I do a "hard core" protein (nexxus emergencee) the wash before and the wash after touchup. In the 10 weeks between touchups I do mostly moisturizing conditioners, with perhaps one or two "soft core" protein (nexxus keraphix or aubrey GPB), if needed or not at all, depending on my then current lifestyle and how my hair is behaving, how I'm styling, the season, etc. For example, during summer, I do more soft core proteins in between because I swim more and my hair needs the extra stregth. So, for me, three rules re: protein:
1. Use protein sparingly, use LOTS of moisure; thus, I generally do moisturizing treatments 95% of the time, and protein 5%.
2. ALWAYS do protein treatments before and after chemicals, even if don't do at any other time.
3. Use protein sparingly at all other times as needed.
I think you kinda have to "listen" to your hair because it is really easy to over do protein. Afterall, pretty much all the hair products have some form of protein them so err on the side of caution. IMO, relaxed hair has a much greater need for moisture than for protein. If I had to choose only ONE form of treatment forever, it would be the moisturizing treatments. . .