We get asked this question a lot and we answer:
Most salon brands of shampoo do not build up on hair. We feel if you are using a good shampoo it will continue to work effectively as long as you want to use it. So, in short we do not feel that you need to change your shampoo. However, may we suggest shampooing occasionally without using any conditioner or styling products to give hair a rest. The secret is to choose the right products for your hair! Fine or thin hair can sometimes be more fragile and could benefit from a salon brand protein enriched shampoo and conditioner formula with a light level of conditioner. Curly hair may tend to be dry, and therefore can benefit from products which include moisturizing ingredients such as Catwalk Curls Rock or DevaCurl products.