Typically, Nioxin Hair Care System Kits cost $45 USD (full size kit) and $29 (trial size kit). Nioxin Shampoos range $28-$33 USD for a 16.9 fl oz (500ml) bottle. Nioxin Conditioners cost $24 USD for a 10.1 fl oz (300ml) bottle. Prices vary depending on where you buy, but moreover because of hair's color treatment (if any) and product size.