Caffeine is considered a universal stimulant, but among people with Attention Deficit Hyperactivity Disorder the response to ...

Paraxanthine is the main metabolite of caffeine. Studies suggest it can boost alertness and focus, but the research base is ...

Coffee's impact on sleep isn't straightforward habitual drinkers may adapt, showing little disruption, though timing and moderation still matter.

The U.S. Food and Drug Administration says it does not have regulations geared toward caffeine pouches. There’s concern in ...

For instance, sugary coffee drinks can cause a spike in blood sugar followed by a sharp drop, which may leave someone feeling ...

Mixing caffeine and alcohol may make you feel more alert, but it doesn't make you less intoxicated. Here's what to know.

A staggering 94% of Americans use caffeine, 64% of whom do so on a daily basis. It’s the energy enhancer people start their ...

A large, decades-long study of more than 130,000 participants suggests that moderate consumption of caffeinated coffee or tea ...

Many people say drinking regular coffee makes them feel wired, anxious, or ultra-jittery. But for those of us who love the ...

Green tea is more than a warm wake-me-up beverage or a soothing midday sip—the tea contains several compounds that can have a real impact on your body and health. We talked to dietitians who ...

Paraxanthine is the main metabolite produced when the body processes caffeine. The liver converts caffeine into three compounds: paraxanthine, theobromine and theophylline. Of these, paraxanthine is ...

Eye pressure refers to a pressure created by the fluid inside the eye. This pressure may go up if caffeine and alcohol are consumed in excess.