Ntbm offers a money back guarantee on all their products. So you can try n2shampoo yourself and if it doesn't work you can get your money back. Obviously it's working or people would simply return it and never buy it again. What have you got to lose by trying it?
Seriously don't you still get my point? People who are prone to Andronegetic alopecia or male patern baldness will have hair loss some time in their life. Taking gear will only accelerate this progress, to counter this you NEED a strong anti-androgen. In this case the shampoo won't help you at all.