What is caffeine youre most probably familiar with caffeine being that buzz you get from your morning cup of java youre not wrong therecaffeine is a stimulant that is found naturally in coffee tea and guarana amongst many other plants and herbs why use caffeine caffeine is a high quality food supplement that provides 200mg of caffeine per tablet this natural stimulant has been found to contribute to an increase in endurance capacity and performance among athletes caffeine is also