That way, the roots grow in a little more gracefully,” says Kali Ferrara ... you really want to focus on growing out gray hair, you’re just going to have to start all over again.

My hair is grey, but not with years, Nor grew it white In a single night, As men's have grown from sudden fears.

For years, we have watched presidents’ hair go gray and we used that as empirical evidence that stress can, indeed, cause gray hair. But does it? A recent study conducted at Columbia University ...