Honestly, I don't understand the women that decide to go "au natural" in their forties or fifties. I can't think of anything that will age you more, not wrinkles, nor sun damage, nor extra weight, not even knitted Christmas sweaters. All you need to do is find yourself a fabulous colorist and your gray can be as good as gone. For those on a budget? Clairol and L'oreal make great at -home color kits. I'm in the middle...fortunately I can afford a professional color every 5 weeks, but nowadays my gray is so prevalent, I need a touch up at the mid-way point. Clairol's Nice and Easy Root Touch-up is my little lifesaver. In 10 - 15 minutes I can cover the roots in my part, at my temples and even brighten up my overall hair color.
So, camouflage that gray, somethings are never meant to be natural forever. Now, maybe I'll consider a little showing through when I hit 70, but then again, maybe not.
My little lifesaver
photo credit: Clairol