Reduce the appearance of thinning hair with this powerful Keranique Follicle Boosting Serum. Designed to be used on the hair and the scalp, this hair strengthening serum contains the proprietary Keratin Amino Complex™ which effectively bonds to natural keratin protein found in your own hair follicles. The power of this fusion helps to make hair appear thicker, while it also infuses the hair with rejuvenating peptides that helps to rebuild the hair shaft and prevent breakage. With every use, the Keranique hair boosting serum fortifies the outer layers of every hair shaft, ensuring it continues to gain strength as it receives nourishment from proteins and other hair supportive ingredients. Despite its strength, this cruelty-free Keranique serum is light, fast-absorbing. Sulfate-, dye-, paraben, gluten- and phthalate-free. 2 fl. oz.