How does caffeine affect my sleep?

Caffeine affects your sleep in that it's a shock to your system, making drifting off to sleep difficult. Watch sleep expert Michael Breus, PhD, explain why a cut-off time for caffeine in the afternoon is beneficial if you are sensitive to it.

You probably knew about the effects of having caffeine late in the day. But what about these other causes of sleeplessness?

What you eat—and when you eat it—can significantly impact your ability to fall and stay asleep.

Does this common vegetable oil increase the risk of heart disease and cancer? Get the facts.