I've been coloring for years--started getting grays in my 30's when my daughters were born. I've been thinking about letting it go natural, but my hairdresser and my daughter (who is also a hairdresser) say no. I work in an industry with a lot of younger women, so I figure I'll keep coloring until I retire, and then let it do its own thing. My daughter keeps saying she'll tell me when she thinks it's time--but then again, she still thinks I'm 30!