You wake up after a terrible night of sleep, and the fog is immediate: names slip away, your train of thought derails ...

Summary: Researchers dismantled the classic assumption that a person’s ability to easily fall asleep after a cup of coffee ...

Researchers found caffeine changes brain activity during sleep, reducing deep restorative sleep and keeping the brain more ...

Evening coffee has sparked controversy for years. Some people fall asleep without difficulty, while others toss and turn for ...

But beyond the grogginess, research is now showing that consistently missing out on certain sleep stages, particularly deep ...

During sleep, the brain cleans itself, turning up the flow of cerebrospinal fluid through the gray matter parenchyma to wash away waste. What powers this flow? In the February 28 Nature online, ...

Are you waking up in a puddle of sweat — if you can sleep at all? That's the grim reality for millions of people around the globe suffering through severe, unbearable heat waves. July is the hottest ...

Researchers have known that a lack of quality sleep can increase a person’s risk of diabetes, but it’s not been known why. The results of a study in humans by a team of sleep scientists at the ...

Share on Pinterest Might deep sleep play a role in blood sugar control? Image credit: Igor Ustynskyy/Getty Images. Also concerningly, in 2019, 96 million Americans aged 18 and older had prediabetes, ...

Sleep has a profound impact on human health, improving attention, memory, emotional regulation and work performance, and reducing the risk of disease 1, 2. But over the past few decades, the amount of ...

Sign up for CNN’s Sleep, But Better newsletter series. Our seven-part guide has helpful hints to achieve better sleep. Are you waking up in a puddle of sweat — if ...