Caffeine can linger in your system for 10 or more hours, which can impact sleep. Double-shot lattes and cold brews have ...

Medically reviewed by Patricia Mikula, PharmD Key Takeaways Most pre-workout effects peak within 30-90 minutes, but caffeine ...

Drinking too much coffee can overstimulate your nervous system, leading to jitters, anxiety, digestive upset, a racing heart, ...

A genetic study reveals that it is not coffee itself, but how long caffeine remains in the blood, that influences the risk of diabetes.

When you’re pregnant, everything you consume becomes a consideration not just for your own health, but for your baby’s growth ...

Excessive caffeine consumption from energy drinks can raise the risk of stroke, heart rhythm disorders and dehydration, ...

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 ...

Researchers are still studying how caffeine might affect fertility, as the current research isn’t conclusive. They do know that caffeine can impact hormone levels and the reproductive system. “The ...

Energy drinks are designed to boost mental and physical alertness, but they often contain high levels of caffeine, sugar, and ...

From espresso to energy drinks to supplements, caffeine comes in many forms, Rula notes. And if you're like most people, you probably enjoy a cup of coffee each morning or a late-afternoon soda to ...

What if a cup of coffee could help treat cancer? Researchers at the Texas A&M Health Institute of Biosciences and Technology ...

A cup of coffee or tea in the morning or an afternoon caffeine pick-me-up is usually fine for most adults. But parents might want to take a closer look at caffeine and other ingredients in the drinks ...