After bleaching and dyeing my hair deep gray, I found it hard to maintain, so I was looking for solutions. A salon recommended this color shampoo, so I bought it. I bleached my hair three times, but the gray color lasted longer than I expected! It seems to reduce staining, and I left it on for 5 minutes while showering. I think I was told not to use it too often, but since I dislike fading, I used it about three times a week, haha. If I bleach my hair another color, I will probably buy it again. Other shampoos stain my hands, but this one doesn't leave any color on my hands or nails, which is great! Kiu also recommended this color shampoo. Please release more colors! I highly recommend it and hope it sells well!