I had used this on my hair it work well help make my haircolor even take away any unwanted tones in my hair and the color last for a little bit but it's a great product .
I have very fine hair that tends toward brassiness, I use the 7A medium ash blonde and it's the perfect color - the best haircolor I've ever used, not damaging, and cheap! I also switched from permanent color to demi to reduce damage to my fine porous hair. Highly recommend.