Caffeine is a naturally occurring stimulant often found in coffee, tea, chocolate and various energy drinks and medications.

朝一番や疲れてきた時間帯にコーヒーを飲み、学校や仕事を乗り切るための活力を得ている人は多いはず。一般にコーヒーの効果は、精神活性作用を持つカフェインによるところが大きいと考えられていますが、新たな研究では「コーヒーを日常的に飲んで ...

A growing body of laboratory research suggests that caffeine, the most consumed psychostimulant in the world, may reduce symptoms of anxiety and depression by suppressing inflammatory signaling inside ...

Learn how caffeine affects brain chemicals and health, sleep, and mood. Understand safe daily limits, hidden sources, and signs you’re getting too much.

Paraxanthine, the caffeine metabolite backed by Kim Kardashian’s 300mg UPDATE drink, promises focused energy without jitters ...

By Vijay Kumar Malesu A controlled human study reveals that coffee’s complex chemical matrix may shape immune responses ...

To convert fluid ounces to milliliters, multiply by 29.57. To convert ounces of chocolate to grams, multiply by 28.35. The caffeine content is shown for commonly used versions of energy drinks and ...

Myasthenia gravis (MG) is caused by decreased acetylcholine activity in your body. Because caffeine slightly increases acetylcholine activity, there is some interest in how it may affect MG symptoms.

You hear it all the time, when it comes to sleep: Don’t drink caffeine too late in the day. It’s among the most common sleep tips—and it’s a good one. Caffeine, with its stimulant effects, is ...

Going cold-turkey may cause some daily coffee drinkers to experience a lingering headache that could last for two to three days.