For people who are busy working, coffee has become a mainstay of daily drinks because of its ability to increase energy and concentration.
This benefit can be obtained because the caffeine content in coffee is quite high.
Coffee is also cheaper when compared to buying caffeine supplements, so drinking coffee is a better choice.
Caffeine is a substance that is soluble in water and fat so it can be absorbed by the body easily. This substance works to keep you awake by attaching to adenosine.
Adenosine acts as a receptor (signal in the brain) that slows down the activity of nerve cells and causes the brain's blood vessels to widen, causing drowsiness.
Because adenosine is constantly being produced in the body, the amount will increase throughout the day.
@sonea-nakamaru - Mikanaka