I was having a lot of problems with my hair being super oily immediately after I got out of the shower. I read online that the John Frieda brand of hair products really helps with this problem, so I purchased the Visibly Brighter shampoo and conditioner. It has literally CHANGED my life. My hair is so smooth and shiny, and so much healthier. I was shocked at the immediate difference, and the oiliness completely disappeared.
As for the lightening effects, I haven't really noticed any difference. However, my hair is very dark brown (almost black) so I don't think any product aside from full strength hair dyes would have an impact on the color. Overall, five stars!! I will be using this line for a verrrrrrry long time.