First gray hairs appeared just above my ears in my 20's and I thought nothing of them. I did get alarmed when I spotted my first gray chest hair -- probably in my 30s, but that was short lived. Since my hair has also been thinning since my 20's, it is good that I'm not especially attached to it. On the plus side, the only thing that I do with my hair is run the clippers over my head with no guard every other week. It saves a lot of time on grooming and I haven't purchased any hair care products for nearly 20 years.