Hairprint True Color Restorer is a patented formula that recreates eumelanin, the pigment that colors all brown and black hair. Hair color is generated by pigment created in the cells inside the hair follicle. Hairprint Color Restorer imitates that biological process and adds eumelanin to your hair from the outside. Working with a vegetable extract from velvet beans, we have created a simple way to restore gray hair. There are no dyes, no PPD, no PTD, no coal tars, no parabens, no high levels of ammonia or peroxide to strip color, no smells, itching or burning. Hairprint not only restores your hair color it also strengthens the hair, and adds body and shine where applied. The eumelanin pigment that is naturally in your hair is a protein. So while you are changing your gray hairs back to their natural color, where applied, you are also adding protein to the hair!