If you have sensitive skin and hair, you should use natural products that are completely sulfate-free to avoid side effects. The use of free sulfate shampoos may seem different at first, for example it takes longer for the shampoo to foam and you have to use more shampoo to thoroughly clean your hair, you also have to spend more time rinsing your hair. If you use sulfate-free shampoo properly, it will be as effective in cleansing your hair as sulfate-containing shampoos.