Caffeine is one of the most popular psychoactive substances in the world. Caffeine can help increase metabolism and increase fat oxidation.
In athletes, caffeine has been found to also improve athletic performance in both explosive movements and endurance. Paraxanthine, a metabolite of caffeine, has the effect of increasing lipolysis which leads to greater fat loss.
If you are drinking other products throughout the day that contain caffeine (coffee, soda, energy drinks, etc), remember to take that into consideration before using caffeine powder.