When caffeine is inhaled through a vape, it enters the bloodstream through the lungs and is quickly absorbed by the body. Once in the bloodstream, caffeine travels to the brain and affects the central nervous system. Caffeine acts as a stimulant, blocking adenosine receptors in the brain, which helps to prevent drowsiness and promote alertness.
The stimulant effect of caffeine on the nervous system can increase neuronal activity and enhance cognitive function, such as improved