Helps restore mental alertness or wakefulness when experiencing fatigue or drowsiness. Get direct results for all of your endevours with the highest quality Caffeine available! Prolab Caffeine is the most popular drug on the globe. It 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. 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.