I dyed my hair ash blue and used this shampoo when the color started to fade. Maybe that's why the color lasted quite a while! I used it every 3-4 days, and I loved that it smelled good and didn't damage my hair much! I was worried that my hair, which doesn't take bleach well, would quickly turn yellow and get splotchy, but thanks to this shampoo, I was able to maintain the color for a long time without it turning yellow! However, I noticed that with continued use, my hair felt a bit stiff, so I think it would be 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 great condition without much damage! If you've bleached your hair, definitely give this a try!