Caffeine

tree native to tropical South America producing cocoa beans - the source plant of cacao and chocolate

Caffeine is a central nervous system (CNS) stimulant of the methylxanthine class and is the most commonly consumed psychoactive substance globally. It is mainly used for its eugeroic (wakefulness promoting), ergogenic (physical performance-enhancing), or nootropic (cognitive-enhancing) properties; it is also used recreationally or in social settings. Caffeine acts by blocking the binding of adenosine at a number of adenosine receptor types, inhibiting the centrally depressant effects of adenosine and enhancing the release of acetylcholine. Caffeine has a three-dimensional structure similar to

species of plant

any beverage that contains high levels of a stimulant ingredient, usually caffeine, as well as sugar, and often supplements, such as vitamins or carnitine

species of plant

fruit of the kola tree

Decaffeination is the removal of caffeine from coffee beans, cocoa, tea leaves, and other caffeine-containing materials. Decaffeinated products are commonly termed by the abbreviation decaf. To ensure product quality, manufacturers are required to test the newly decaffeinated coffee beans to make sure that caffeine concentration is relatively low. A caffeine content reduction of at least 97% is required under United States FDA standards. A 2006 study found decaffeinated drinks to contain typically 1–2% of the original caffeine content, but sometimes as much as 20%.

recreational drug

crystalline material

central nervous system stimulant drug which occurs in nature as part of the coffee, tea, yerba mate and other plants

species of plant

caffeine overdose

risks and possible benefits of drinking coffee

medical condition

caffeine-free version of Coca-Cola introduced in 1983.