Zenith Nutrition Caffeine is the new natural source of energy and focus. Caffeine in it is an alkaloid obtained from the dried leaves of Thea sinensis, Tea, or the dried seeds of Coffea arabica, Coffee. It has been primarily used as a central nervous system stimulant, diuretic, circulatory and respiratory stimulant. It temporarily restore mental alertness or wakefulness when experiencing fatigue or drowsiness. It provides the energizing effects of caffeine without added sugar or calories or compromising your dietary goals. It helps burn excess calories and boost metabolism.