Can caffeine make up for a lack of sleep?

Caffeine can certainly mask the effects of sleep deprivation by waking you up, but you still need real sleep to refresh your mind and body. In this video, sleep expert Michael Breus, PhD, explains why caffeine cannot make up for a lack of sleep.

Muddled thinking, poor reflexes (don’t get behind the wheel!), memory problems—and that’s the short list.

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

Find out how to prevent morning breath by taking some simple steps the night before.

An overview of early-stage and late-stage diabetic retinopathy, with a look at diabetic macular edema.

If you are living with nasal polyps, answering these questions may help you better understand your experience.