No, not using any concealers, or dying my hair , or using just for men. I can only think it is because of the difference in lighting and also that the hair that was moved from the back of my head was a lot darker than the hair at the front of my head, (what was left of it) I am not on any kind of medication either. I do know I was very lucky to have found Dr Lorenzo though to do the transplant. ( After a lot of time researching him and other doctors) I don't have a problem with my hair going grey, i'm just happy to have some.