Helps restore mental alertness or wakefulness when experiencing fatigue or drowsiness. Caffeine is an alkaloid; of which there are numerous compounds such as the methylxanthines, with three distinguished compounds: caffeine, theophylline, & theobromine, found in guarana, kola nuts, coffee, tea, cocoa beans, mate & other plants. These compounds have different biochemical effects, & are present in different ratios in the different plant sources. Caffeine is a powerful stimulant to the Central Nervous System.* Moderate use seems to be desireable by all, male & female; although excessive use can produce undesireable effects. Caffeine was discovered in 1820. In 1838, it was found that theine, a substance in tea, was identical to caffeine. Six or so caffeine containing plants are used more worldwide as a beverage than any other plants & herbal materials put together. The many caffeinated natural plants are are: Coffee, Tea, Kola, Cocoa, & Guarana.