Kérastase's Sérum Thérapiste is a hair care product that has a unique formula designed to repair tresses in two stages. As a bi-phase beauty product, the serum consists of an oil and a cream topcoat, which come together to repair hair fibers and protect against the use of heat. Although these ingredients would normally repel one another, the use of both at once brings together more benefits in a single product. The hair care product is meant to be applied to towel-dried hair, promising to leave hair looking and feeling like new, with no broken strands.
The use of Kérastase's Sérum Thérapiste is meant to be step three in the brand's cleanse, treat and texturize beauty ritual, following the use of its Soin Premier Thérapiste pre-shampoo conditioner and Bain Thérapiste shampoo.