In humans, caffeine is a central nervous system (CNS) stimulant, having the effect of temporarily warding off drowsiness and restoring alertness. Nowadays, beverages containing caffeine such as coffee, tea, soft drinks and energy drinks are very popular.
In humans, caffeineis a central nervous system (CNS) stimulant, havingthe effect of temporarily warding off drowsiness andrestoring alertness. Nowadays, beverages containingcaffeine such as coffee, tea, soft drinks and energydrinks are very popular.