including coffee beans, tea leaves, and cocoa nuts. Caffeine is really a biological poison used by plants as a defense against being harmed and injured by the other forms of life in their environment. The caffeine gives seeds and leaves a bitter taste, which discourages their consumption by insects and animals. If predators continue to eat a caffeine-containing plant, the caffeine can cause central nervous system disruptions and even lethal side effects. Most of them learn to leave the plant…