“…Caffeine contents are strongly related to the quality of coffee beverages, because it contributes to its bitterness (Farah, Monteiro, Calado, Franca, & Trugo, 2006). Caffeine is well-known for increasing alertness, through stimulation of the central nervous system, rising blood circulation and respiration, being probably the main reason for coffee popularity (Belitz et al, 2009;Reich, Dietrich, Finlayson, Fischer, & Martin, 2008). Other possible benefits of caffeine include mood enhancement, better exercise performance and reaction time, and reduction of symptoms associated with Parkinson's disease and tremors (Heckman, Weil, & González de Mejía, 2010).…”