I have blonde hair with some mixed darker/dirty blonde colors, and a few months ago I got some great highlights. A few weeks later, I went away where there was water with a lot of iron in it. After shampooing my hair a few times there I noticed my hair got very brassy, orange-looking, and the highlights appeared to be completely gone! After six weeks of trying different shampoos to try to get my color back, I got an in-salon Malibu C treatment and immediately could tell the difference, my hair color was coming back!! I also started using the shampoo and conditioner. I can definitely see my hair is drastically improving! Thank you!!