Caffeine is a stimulant found naturally in tea leaves, coffee beans, and cocoa. This is the most widely used stimulant.
Caffeine affects our central nervous system and acts as a blocker of phosphodiesterase (PDE), which blunts lyposis (fat burning) Therefore, since caffeine inhibits PDE, it allows for lyposis to occur at an accelerated rate.
Overall, after caffeine consumption there are more fatty acids available for oxidation. Caffeine increases the release of fat from body fat stores so it can be used in lyposis, promoting weight loss.