Wear the world's most popular central nervous system stimulant with style! (geekwrapped.com)
As previously discussed, this makes caffeine a powerful Central Nervous System stimulant and has been proven to improve alertness, decision making and cognitive processing, especially in a time of extreme stress or fatigue. (fitnessandpower.com)
Caffeine in humans ia central nervous system stimulant, that helps ward off drowsiness, and improves alertness. (bodybuildingforyou.com)