I had a hair procedure done by Dr. Vito Quatella in Rochester, NY about two months ago. I specifically asked him about shampoos, etc and he recommended Nioxin.
I've only used Nioxin for about 6 weeks now so it is still too early to tell if it will help grow hair for me, but the shampoo & conditioner feel better on my scalp than any shampoo I have ever used including Nizoral, which I used on and off for years.