When I started working at the salon I work in now, people told me Pantene puts a wax build up on your hair, and that it is terrible for your hair. They say when you use Pantene it wont penetrate thru color. Anyway, so if you are going to use Pantene I don't see any ingredient that is a wax in it, I think people just make it up. I have had clients who use Pantene and color won't penetrate their hair, and it takes a clarifying treatment or double process to get the color on. However, I do not believe it causes cancer or is filled with wax. I will say this, that professional shampoos and drugstore shampoos are basically the same, the only difference really is the sulfate agent that is used in it, the sulfate agent can be harsh for your hair, and some are more sensitive to others. It also depends on the type of shampoo you want, smoothing, hydrating, color care, dry itchy scalp, etc etc. Sulfate is what can cause the color to fade, and also helps shampoo lather up well. Sometimes sulfate free products dont lather as well, and people love the lather. Sulfate free is a mild version and some people are sensitive and skin and scalp drys easier.
I used to use Tresseme for a long time, and Salon Selectives they smelled great. Pantene was just to heavy for my hair. I use professional products now, but I switch between sometimes I use organix coconut milk conditioner and shampoo which are sulfate free, but the conditioner doesn't do as well as I would like it to.