I’ve been using this product every other day for one and a half months and most of my gray is gone. You have to be patient but if you are it really does work. I’m hoping that after two months I will pretty much have all my gray covered and I will be able to reduce the application to once a week. When I started out I only needed root coverage and not my whole head. I think it works best for people who have hair that is not too dark. Mine is chocolate brown and so far most are about the same shade as my natural color. I usually apply it to damp or wet hair and I comb it through which seems to work better than applying to dry hair.