Caffeine is an alkaloid compound which is found especially in tea and coffee plants and is a stimulant of the central nervous system. For a list of common drinks with caffeine, visit 'https://cspinet.org/eating-healthy/ingredients-of-concern/caffeine-chart'. "Caffeine comes with a burst of energy, which is what most of us use it for. However, that energy also stimulates our “fight or flight” hormones. This may cause an increase in anxiety, nervousness, heart palpitations, and even panic attacks." - www.healthline.com "Caffeine can reduce the quality of your sleep", "After time, coffee doesn't give you any more energy" - wealthygorilla.com