I\’m in my mid 30s and I have grays coming in. The grays are obvious since I have dark black/brown hair. I tried Madison Reed and four different drug stores brands of hair color which caused a lot of residue in my hair, seeing the color fade, hot roots, and excessive itchy scalp. I used this root touch-up kit and the color still looks great. The grays remained covered. I bought the black/brown which came out as a rich black. The color covered up my hot roots. I do have some scalp itch, but I have extremely sensitive skin. It is definitely worth the $15 bucks per treatment. Awesome product!