Conventional forms of caffeine can have unwanted side effects that make it hard to sit still and focus. Stimulated by the release of epinephrine (a.k.a. adrenaline), these sudden feelings of excitement, muscle tremors, or accelerated heartbeat may be helpful in "fight or flight" situations, but the jittery sensations are not beneficial when trying to focus for work, sports, or gaming. Learn how Guayusa is changing how we look at caffeine in solving the caffeine paradox.