Well, to my knowledge, and through my experience, I tend to shy away from the color extending shampoo and conditioners.  The reason for me though, is not that I didn’t notice a difference in my hair color’s life, but that the ones I’ve tried have tended to dry my hair out.  Like I said though, I may have been using the wrong products. 

The only difference between color hair care products and regular hair care products, is primarily the fact that color extending hair care tends to be extra moisturizing, since hair that is more moisture intense tends to hold color. 

Remember, I said that it actually dries my hair out though!  The other difference may be that color hair care will have color pigment in it, so that it continually deposits new color and breathes new life into your hair color, tone and shine. 

Most of them do not actually contain pigment, but rather rely on some sort of super-hydration technology to prevent drying and fading.  So, next time you look for a hair care product, you know that color extenders really are just a moisture-pumped version of their non-color extending counterparts – most of the time.