IT WILL STAIN YOUR HAIR PURPLE IF YOU OVERUSE THE SHAMPOO.
I myself know this first hand from using Fanola as my main shampoo for two weeks in a row. Overuse of Fanola left my hair looking purple/grey vs the pure white tone.
Purple and grey pieces throughout didn't bother me much and people assumed I colored my hair that way on purpose.
If you do end up staining your hair, don't worry! After a few washes the purple comes out leaving your hair pure white!
Since this product is so pigmented it is rather harsh on your hair. For me, it took away some of the strength and integrity of my hair itself because of over use. I highly recommend using a weekly conditioning treatment while using the Fanola , No Yellow Shampoo.
My overall journey to getting this white hair was a process and I had tried so many toning shampoos it really made my hair take a beating. For those of you who haven't put their hair through the wringer, you won't be at such a risk of your hair turning purple.
Below are my final result pictures.
I achieved this by using the Fanola once a week and combined my shower routine with a conditioning treatment. Addtionally I used the Joico Purple shampoo/condtioner and a leave in conditioner after my shower!