Achieve Salon-Like Hair, Every Day To effectively rebuild the hairs keratin levels and to provide the hair with intense care and nourishment while you are styling. Keratin is the building blocks of your hair, and is damaged by sunlight, saltwater, hair products and heated styling tools. Keratin Boost is specially developed to rebuild the hairs keratin level, while also giving intense care, shine and nourishment to your hair. Benefits: Rebuilds the hair's keratin level Gives deep and intense care and nourishment Leaves hair shiny and lively Keratin Boost can be used to fill our Nourishing Styler, or as a 2-4 minute rinse-out, after conditioning How To Use: After shampooing, apply and leave in hair for 2-4-minutes before rinsing out and finishing with conditioner.