For locks that deserve extra attention, the Kérastase Specifique Potentialist Hair Serum is designed to balance and revitalise all hair types. Infused with vitamin C and 10% bifidus prebiotic, the protective formula helps to intensely nourish while shielding strands against external aggressors. It helps to soothe uncomfortable scalps and preserve the skin barrier, creating the optimal foundation for healthy-looking hair. With a fast-absorbing, lightweight texture, this hair serum helps to leave your mane with a soft, protected and rejuvenated feel.