Most of us drink coffee for the caffeine, which is a stimulant that makes us feel energized.
Caffeine is considered a psychoactive drug, meaning that it affects not just the body, but mood as well.
The average amount of caffeine in a cup of coffee is between 90 mg to 100 mg.
It’s been repeatedly shown to enhance brain function, which is the most common reason why it’s the preferred method of coping with long hours.
As the brain works, it produces a hormone called adenosine and the buildup of adenosine through the day leads to that tired feeling.
Only sleep will get rid of the adenosine, but caffeine can block some of the adenosine’s effects, letting you feel alert again.