I noticed my first gray hair when I was 17! It made me think of my grandma (my Mom's mom) who's hair was completely white before she was 20! And so it begins I thought. I yanked that gray hair out and put it in an envelope and sealed it up with the date. Now at 58 my hair too is completely white ...or at least it would be if I didn't color it! Even now with 6 grand children and a 7th on the way I'm not yet ready to look like a grandma!