Photo: iStock/Christian Horz

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Letting Your Stress Levels Get Out of Control Every. Single. Day

How it's aging you: If and when you go gray is determined by genetics, but if you're prone to it, work worries aren't going to help. "If you're genetically predisposed to have gray hair early, stress can probably accelerate that time frame," says Nazarian. How exactly can stress lead you to go gray, you ask? "When you're putting out those stress hormones," says Hirsch, "you can see some loss of the melanocytes that determine hair color."

The fix: Regular appointments with your colorist aside, findings ways to manage your stress is essential, and certainly not just for the sake of your hair. Meditation, exercise, journaling, breathing practices—try different options and once you settle on the habit that really makes a difference in your stress levels, make it a part of your daily routine.