Nioxin Conditioner System 4 300mL Sale! from 2495 /per Qty. Sold Out This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Nioxin Conditioner System 4 Scalp Therapy Conditioner For noticeably thinning, chemically treated hair. Apply from scalp to ends. leave in for 1-3 minutes. Rinse. Tweet