Coffee is a beverage brewed coffee beans that have been roasted and ground into a powder. Coffee is one of the world's commodities are cultivated more than 50 countries. Two varieties of coffee trees that are known in general that Robusta (Coffea canephora) and Arabica (Coffea arabica).
Coffee is well known for the high content of kafeinanya. Caffeine itself is a secondary metabolic compounds alkaloids from coffee plants and has a bitter taste. Various health effects of coffee is generally associated with the activity of caffeine in the body. The main role of this caffeine in the body is increasing psychomotor work so that the body is maintained and provide the physiological effect of increased energy. This effect is usually only seen a few hours later after coffee consumption.