Nioxin System 5 CleanserNioxin System 5 Cleanser is a daily cleansing shampoo that gently removes pollutants, residue and dirt from the hair while promoting a healthy, strong scalp. Fortified with peppermint oil, this professional quality shampoo cleanses the hair and scalp in preparation for the complete System 5 thickening treatment, while encouraging scalp health through vasodilation in the derma level to stimulate blood flow to the hair follicle.