Through developing advanced hair technologies, Nioxin have managed to create a range of products especially designed to support people experiencing hair thinning. Nioxin's Hair Booster treatment delivers an intensive boost to areas of the scalp that are suffering from low density. How Does It Work? Nioxin's Hair Booster works by targeting areas of advanced hair thinning, commonly the crown or the hairline, with its advanced ultra-concentrated formula. This intensive formula also contains Keratin which helps protect the scalp against cuticle damage as well as boosting fragile hair. Directions for Use Hair Booster is a leave in, vitamin enriched formula that should be used twice daily. This product works best when combined with Nioxin's 3 Part System treatments.