Nioxin System 2 Scalp Therapy -- for fine, non -chemically enhanced hair that is noticeably thinning - is a conditioner that moisturizes and energizes. BioAmp adds thickness from inside the cuticle and strengthens the hair shaft. Active-Renewal helps provide a more youthful-looking scalp complexion. TransActive Delivery System is a time-release delivery system formulated with vitamins that provides moisturizing nourishment for the scalp and hair. Nioxin System 2 is a 3-Step system for FINE, NATURAL, NOTICEABLY THINNING HAIR that consists of the Cleanser, the Scalp Therapy and the Scalp Treatment.