Christi says: I did this today to my very black hair, it lightened my hair to the color it was before I dyed it. Works way better than hair color remover and doesn't damage your hair. HOW I LIGHTENED MY HAIR DYE: Mix 15-20 crushed up (non-coated) Vitamin C tablets with enough anti-dandruff shampoo for it to become a paste. Run through damp hair and massage to lather like shampoo. Let sit on hair 1-2 hours, rinse and condition.