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. Actv-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.FeaturesBioAMP adds thickness from inside the cuticle and strengthens the hair shaft. Actv-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.DirectionsAfter cleansing, apply to wet hair. Leave on 1-3 minutes. Rinse.