Sara Moniuszko is a health and lifestyle reporter at CBSNews.com. Previously, she wrote for USA Today, where she was selected to help launch the newspaper's wellness vertical. She now covers breaking ...

Melatonin is a hormone naturally produced in the body in response to darkness. It helps you sleep by controlling circadian rhythms. You can also take it as a supplement to improve sleep disorders, jet ...

And how to tell if you might need something else entirely.