Another natural girl here.
I found my first white hair at 30, and I turn the big 40 this year. TBH, it really doesn't bother me that much but it bothers my "much younger...by 3 years" DH.
So far, the only thing I do is pluck the quite obvious ones in front. I don't have that many white hairs...yet. My hair is *very* long, so it's quite funny when DH plucks a white hair that's almost a yard long.
I have yet to ever dye or perm my hair and really can't see it happening in the near future...unless I turn completely gray/white overnight!