I don't think Kimmay's leave-in is the law of the land. She took products that worked well for her, combined them, and brought them to a PH balance desire for hair. I think it is a matter of maintaining the optimum PH balance for her hair. It appears that her goal was to make sure that everything that she put in her hair was at the optimum PH. Using products within the optimum PH keeps the curticles from going from one extreme to the other extreme. As we all know that leads to breakage and dryness.