Biogenol Color Care Violights

I'm confused anyone could give this product fewer than five stars; it makes me wonder how they're using it. Violet shampoos are intended to tone brassy tones. That brassiness is typically...

I'm not sure what this product does. It's vivid purple. It claims to take out the brassy tones of highlighted hair - but it did nothing noticeable for my highlights. :( I won't buy it again.

OK shampoo that I use 1-2 times a week to keep the yellow out of my blonde highlights. I have naturally black hair ( I am asian) and highlight my hair with blonde and caramel highlights. The...