Topic
caffeine
chemical compound used as a stimulant
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Topic
chemical compound used as a stimulant
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Caffeine is a central nervous system (CNS) stimulant of the methylxanthine class and is the most commonly consumed psychoactive drug globally. It is mainly used for its eugeroic, ergogenic, or nootropic (cognitive-enhancing) properties ; it is also used recreationally, often 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 that of adenosine, which allows it to bind and block its receptors. Caffeine also increases cyclic AMP levels through nonselective inhibition of phosphodiesterase, increases calcium release from intracellular stores, and antagonizes GABA receptors, although these mechanisms typically occur at concentrations beyond usual human consumption.
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“To my mother, pouring the morning coffee was a secret ritual—irrigating the garden, she called it.”
“I have measured out my life with coffee spoons (...)”
“The voodoo priest and all his powers were as nothing compared to espresso, cappuccino, and mocha, which are stronger than all the religions of the world combined, and perhaps stronger than the human soul itself.”
“Coffee futures are up over 60% this year to $3.18 per pound, the highest level since 1977”
“Coffee was only a way of stealing time that should by rights belong to your slightly older self.”
“No "food drink" has ever encountered so much opposition as coffee...During the thousand years of its development it has experienced fierce political opposition, stupid fiscal restrictions, unjust taxes, irksome duties; but, surviving all of these, it has triumphantly moved on to a foremost place in the catalog of popular beverages.”
Quotes via Wikiquote (CC BY-SA), each with its original source.