All keratin products protect your hair from damage. Like all keratin products, a keratin shampoo also prevents your hair from further damage from day-to-day styling and exposure to harsh environmental elements. Dr Divya recommends using a Keratin shampoo to maintain the smoothness and strength of your hair. In doing so, the keratin protein of your keratin shampoo avoids frizzy hair. Hence, a keratin shampoo is best for all types of hair especially frizzy hair.