New research suggests caffeine drinkers "may have difficulty accurately perceiving the influence of caffeine on sleep quality" Brenton Blanchet is an Associate Editor on PEOPLE's TV team. He has been ...

In a shock to no one, least of all those of us who lap at the sweet teat of coffee every day, a new study has found a positive association between a.m. caffeine consumption and overall mood. In a ...

Most cold brews have less caffeine than hot coffees. But caffeine content in a cold brew can vary depending on such factors as brand, bean-to-water ratio, and brewing time. Cold brew coffee is a type ...

For most people, consuming some caffeine is harmless — but too much can be dangerous. Recent news coverage has raised questions about the amount of caffeine in some popular drinks and what consumers ...