Caffeine Is A Central Nervous System ( Cns ) Stimulant

What is caffeine? Caffeine is a central nervous system (CNS) stimulant, having the effect of temporarily warding off drowsiness and restoring alertness. Beverages containing caffeine, such as coffee, tea, soft drinks and energy drinks enjoy great popularity: caffeine is the world’s most widely consumed psychoactive substance. In North America, 90% of adults consume caffeine daily. [1] Many natural sources of caffeine also contain widely varying mixtures of other xanthine alkaloids, including the cardiac stimulants theophylline and theobromine and other substances such as polyphenols which can form insoluble complexes with caffeine. [2]. Sources Caffeine is a plant alkaloid, found in numerous plant species, where it acts as a natural†¦show more content†¦Certain types of tea, such as black and oolong, contain somewhat more caffeine than most other teas. Tea contains lesser amounts of theobromine and slightly higher levels of theophylline than coffee. Preparation has a significant impact on tea, and color is a very poor indicator of caffeine content. [8] Teas like the green Japanese gyokuro, for example, contain far more caffeine than much darker teas like lapsang souchong, which has very little.---Chocolate derived from cocoa contains a small amount of caffeine. Chocolate is a weak stimulant, which is mostly due to its content of theobromine and theophylline. [9] It contains too little of these compounds for a reasonable serving to create effects in humans that are on par with coffee. A typical 28-gram serving of a milk chocolate bar has about as much caffeine as a cup of decaffeinated coffee. Caffeine is also a common ingredient of soft drinks such as cola, originally prepared from kola nuts. Soft drinks typically contain about 10 to 50 milligrams of caffeine per serving. By contrast, energy drinks such as Red Bull contain as much as 80 milligrams of caffeine per serving. The caffeine in these drinks either originates from the ingredients used or is an additive derived from the product of decaffeination or from chemical synthesis. Guarana, a prime ingredient of energy drinks, contains copious amounts of caffeine with lesser amounts of theobromine and theophylline in a naturally occurring slow-release excipient.Show MoreRelatedEssay about The Effects of Caffeine870 Words   |  4 PagesEffects of Caffeine Works Cited Not Included Caffeine has played a central role in many cultures. Coffee was first discovered over 1000 years ago, and approximately 75% of Americans drink coffee on a regular basis. Despite the thousand years that have passed, there is still controversy surrounding the biological effects of coffee and its primary active ingredient, caffeine. CaffeineRead MoreTaking a Look at Caffeine657 Words   |  3 Pages Caffeine is a chemical that is very commonly known in many different things that we consume as humans. 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