Nioxin 1 Scalp Therapy Conditioner 33.8oz Natural Fine Normal Thinning - For Normal to Thin Looking Hair. Nioxin System 1 Scalp Therapy - for fine, non-chemically enhanced hair in the early stages of thinning - is a conditioner that moisturizes and energizes the scalp. 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 vitamin.