Gently cleanses and removes environmental residue and DHT (Dihydrotestosterone). For natural, normal to thin-looking hair 9 out of 10 people perceive a thickening effect* BioAmp adds thickness from inside the cuticle and strengthens the hair shaft Activ-Renewal helps provide a more youthful-looking scalp complexion Transactive delivery system is time released and formulated with vitamins that provide moisturizing nourishment. *Consumer perception based upon usage of entire Nioxin thinning hair system 1. Made in USA.