That poly-80 shampoo I don't think it works to tell you the truth i just notice my hair thinning out more. i was using nizoral and i thought it was working ok then i stopped using it and started poly-80 shampoo & noxin for 6 -8 weeks so far and i think they dont do much b/c i haven't sen any difference except for thinner hair so I'm going back to nizoral only.