Caffeine is a psychoactive substance that is a dream product ingredient for many American beverage and food corporations. It is a central nervous system stimulant, it is addictive, and it has been ...

A cup of coffee can be the perfect pick-me-up, giving you a quick boost of energy on a slow afternoon. But how long does caffeine stay in your system and can it affect you even hours after consumption ...

Cutting off caffeine earlier in the day may change more than just your sleep quality.

If you're feeling anxious and having trouble sleeping, you may be taking in too much caffeine, or you may be a slow ...

If you love your daily cup of coffee, enjoy it—but timing matters. Drinking coffee earlier in the day not only helps protect your sleep but may also offer long-term health benefits. So, if you're ...

MONTREAL — That cup of coffee you had during dinner with friends didn’t just keep you tossing and turning — it fundamentally altered how your brain operated during whatever sleep you managed to get.

Coffee drinkers may want to think twice before having large doses of caffeine several hours before bed — if they want a good night's sleep. A new study suggests that certain doses of caffeine ...

Caffeine doesn't just make it harder to fall asleep; it changes how the brain behaves during rest. New research shows that caffeine alters brain activity in ways that make sleep look more like ...

When January rolls around, many people decide to give something up, whether it’s animal products or alcohol. Alcohol actually shares qualities with what many people think of as its opposite - your ...

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

SUNDAY, June 1, 2025 (HealthDay News) — Your morning cup of coffee might help you power through the day — but could it be keeping your brain too alert at night, even while you sleep? A new study ...