I dyed my hair ash blue and used this when the color started to fade, and maybe that's why the dye lasted quite a long time! I used it every 3-4 days, and it smelled good and didn't damage my hair too much, which I liked! I was worried that my hair, which doesn't take bleach well, would get splotchy and turn yellow quickly, but thanks to this shampoo, I think I was able to keep it from turning yellow for quite a while! However, if you keep using it, your hair might become stiff, so I think it's good to use it with a treatment! I left it on for 5 minutes before rinsing and then used a treatment, and my hair stayed in good condition without much damage, just like my bleached hair! If you've bleached your hair, definitely give this a try!