WASHINGTON - Even though it might be keeping you up at night, stress isn't necessarily behind that graying hair.
"Gray hair is largely influenced by genetics and a complex series of cell chemistries," Elizabeth Cunnane Phillips, a trichologist, tells Stylist.
But a stressful life paired with a genetic predisposition won't help the situation.
"The majority of gray hair is genetic, but if the person is predisposed ... stress will make it appear sooner."
Phillips maintains there are always variables. For example, before and after photos of presidents indicate that the stressful job brings on the gray hair.
Genetics could be to blame, but also remember that most of the nation's leaders are usually at the age when graying occurs naturally, anyway.
Follow WTOP on Twitter.
(Copyright 2012 by WTOP. All Rights Reserved.)
An NFL player relieves himself of his feelings toward the IRS.
Conn. zoo officials don't know how this baby came to be born.
Want to understand a partner? Get to know their brain.
The "Terminator 2" actor is suspected of violating a restraining order.