Different hair colors are often associated with specific stereotypes, but this hair color might actually have health implications, both positive and negative.

Some hair colors are more common than others.

Dear Doctor K: I am a 43-year-old woman whose hair has gone quite gray in the past year. I'm wondering if stress could have caused it. If not, what else might be the culprit? Dear Reader: Each hair in ...

Q. What causes our hair to gray? Is my hair more likely to gray if I’m stressed? A. Many things can cause our hair to gray, including genetics and stress. The graying of hair most of the time is ...