As I Am Long & Luxe Strengthening Shampoo cleanses hair and scalp gently, reduces tangles and combing damage, thereby strengthening hair for longer hair length. As I Am Long & Luxe Strengthening Shampoo is for type 3 and 4 hair and is part of the Long & Luxe collection for Longer and Stronger hair. External and Internal lab research has established the efficacy of this collection