Sleep

What you feed your body, you also feed your brain — sometimes to its detriment. Learn how to nourish your gray matter for more balanced moods, clearer thinking and a more fulfilling life.

How and when we are exposed to light can affect our bodies in surprising ways. Here’s what you need to know about your body’s responses to cycles of light and dark.

Next time you’re thinking of pulling an all-nighter to beat some looming deadline, consider this: Too little sleep can lead to increased stress levels, compromised metabolism, a suppressed immune system and a host of other health problems.

It's the first thing to go when we're stressed. It's the last thing we get when we're busy. But not sleeping enough can lead our bodies into big trouble. Want to be fit and healthy? Find out why your shuteye should be a top priority.