I have died my hair since I was 16 and I'm now 54, so I know a little bit about hair dye. I'm letting the gray come in naturally and trying to get rid of my existing hair dye. I used dish washing detergent to wash out the hair dye, which left me with this darken, dead color on the tips of my hair. I was just about to remove all the hair color and start over, when I read the suggestion for the Vitamin C mixed in to your shampoo. I took (6) 500 mg of Vitamin C tablets and crushed them to a powder, adding the powder to a quarter size of shampoo. I mixed the two together until it made a paste. I applied the mixture to my hair and let it sit for 60 minutes. When I washed the paste away, my hair looked FABULOUS!! That flat color on the ends was gone and my hair is beautiful. I can't believe this cure all hasn't been made public before. Thanks for the information!!