This buildup will stop hair growth, make your hair dull and limp, and put your scalp at risk of infection. Some people with natural or curly hair address this problem by eliminating shampoo from their regimen altogether, but oils, products, and dirt will eventually build up on your scalp if you don't cleanse it regularly. The market for shampoo has expanded in recent years to offer a wider selection of sulfate-free shampoos than ever before, but many shampoos still contain damaging chemicals that dry out natural hair. It's not as simple as choosing beneficial and natural oils, because your shampoo needs to clean your hair and scalp too. Welcome to another ingredient spotlight! We all know how difficult it can be to choose a shampoo.