Does Nizoral help with hair loss? - Yahoo! Answers Show me another I am 26yrs. old and am looking for some kind of relief from this great thing we call MPB. My uncle who is a doc suggested I use this shampoo once a week. Any thoughts. What is it known to help with. Slowing down hair loss? Growing new hair?? Whats the success rate? Any side effects? However, the suggestion to use this shampoo once a week is ineffective. It is recommended for people with dandruff to use Nizoral once or two times a week, but people who want to maximise its potential to help stop hair loss and aid in regrowth, should use it at least 3 times a week but no more than 4 times, in simple retrospect, you should alternate the use of Nizoral with your normal shampoo every other day. Rogaine has its own clinically proven benefits and directions on use.