Nanogen thickening treatment shampoo gives your hair instant thickening resultsit is made using growth factors and amino acids that are proven to improve hair density from the first wash improves hair density and comfort this shampoo is fortified with patented nanogen growth factors that help to maintain healthy hair it is dermatologically tested and is proven to give users a more comfortable scalp and thicker hair it helps to optimise treatment absorption for minoxidil users