I'm 52. My natural hair color is brown-blonde, streaky mix. Since going gray (started in early 40's), I've had it colored back to its "natural" shades--we let some of the gray show. Usually, the roots come in a bit lighter with a silvery cast, but since going raw, I've noticed the roots have a lot more solidly brown hairs in them, still some gray, but less silvery overall.

What I've read about improved diet is that it can positively affect prematurely gray hair (that might be caused by diet, stress, lack of sleep, etc.), but not natually graying hair. Everyone in my family grayed early, so I expected it, but it's nice to be able to go longer between expensive colorings.

(Please don't hate on me for coloring my hair, y'all! She uses the safest products available and the chemicals don't go up against my scalp. I'm not ready yet to be fat AND red-faced AND gray-haired.)