Recently I found out I was allegic to the ppd in hair dyes. I am premature gray mostly in the front and temple area of my head, so I guess I am still a little to vain to be completely natuaral. I went on line looking for a more natural safe hair dye. I came across ecoColors and after discussing it with my hair dresser of over 15 years I did order it. I applied it myself this weekend and I can say I did not have any of the usual itching or scalp irritation I have been having for years. My hair looks and feels awesome which makes me feel beautiful!! The cost is more than hair dye that you can buy in the store but it is well worh it!!!! Keep up the good work and continue to make products for us with sensitive scalp issues.