Revitalize and strengthen thinning hair with quinine and b vitamins. This conditioner strengthens hair keratin for visible thickness while hydrating and detangling after each shampoo. Its key ingredient, quinine, a molecule with strengthening and toning properties, restores strength and vitality to lifeless hair while the b vitamin complex (b5, b6 and b8) enhances the efficacy of quinine extract. Hair is strong, full and easy to style. Sulfate-free, paraben-free and sodium chloride-free.