The best product that I work with is a product by Joico. The products are Kpak, They have a shampoo and conditioner along with a reconstructive treatment. What makes the Joico products different is that they are made with real human hair karatine protien. Rather than most products that use animal or wheat protiens. So basicly what your hair looses every time the cuticel is opened and shut by the color this will help build your protiens back up. You can find Joico in most salons.
good luck