Sisley-Paris 2.0 oz. Revitalizing Fortifying Serum for the Scalp The Revitalizing Fortifying Serum for the scalp contributes to making hair stronger and denser. Highly concentrated in plant-based extracts, proteins, vitamins and minerals, this fortifying serum energizes the hair bulb to help keep the hair anchored, making it more resistant and protecting its natural color. Fresh fragrance designed to complement the effectiveness of the key ingredients. Ultra light, non-greasy texture, ideal f.