The debate over washing your hair—daily or stretching it out—is a beauty battle as old as shampoo itself. For years, women have been told to "train" their hair to be less oily by skipping washes, ...

Now, how infrequently you wash your hair has become somewhat of a badge of honor. Going three days without shampoo used to be an accomplishment to be proud of. Now, women are boasting about washing ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Confession: I wash my hair almost every single day. I know, I know—it sounds like a cardinal sin for a ...