Interested in having thicker hair? Explore our thicker hair styling products. Kérastase assortment of the best thickeners for fine hair and for thinning hair from the Densifique and Specifique collections range from densifying mousses with Hyaluronic Acid for thinning hair for women and thickening pastes for men's hair. This assortment also includes our best-selling hair and scalp serum, Initialiste Scalp & Hair Serum, cleanses hair build-up and increases hair density. These stylers are ideal for hair types lacking in density and strength that have become thinner in appearance over time. For a fuller head or hair that appears to have more hair fiber and more hair volume, explore our Densifique collection of products for achieving thicker hair or take our hair quiz to find the right product for your thinning hair concerns.