The main effect of the betel nut is stimulation. Betel nut contains arecoline – its main active compound. Arecoline is a mild stimulant that boosts the central nervous system, as well as increasing respiration. As a result the user experiences increased energy and alertness, as well as improved serial learning and memory. Anecdotal reports also suggest that betel nut elevates mood and induces euphoria, likely a result of the stimulating, refreshing feel.