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for educational and safety purposes
Caffeine and Guarana both come up in the same conversations. Caffeine: Caffeine is a central nervous system stimulant of the methylxanthine class and the most widely consumed psychoactive substance in the world. Guarana: Guarana is a climbing plant native to the Amazon basin, classified as Paullinia cupana in the soapberry family Sapindaceae, whose seeds are prized for an unusually high caffeine content.
Caffeine is a central nervous system stimulant of the methylxanthine class and the most widely consumed psychoactive substance in the world. A purine alkaloid found naturally in coffee beans, tea leaves, cacao, and other plants, it is used to restore alertness, reduce fatigue, and sharpen concentration. It is legal and largely unregulated in most countries, and it also has established medical uses, including the treatment of apnea in premature infants.
Guarana is a climbing plant native to the Amazon basin, classified as Paullinia cupana in the soapberry family Sapindaceae, whose seeds are prized for an unusually high caffeine content. Indigenous peoples of the region, including the Sateré-Mawé, have long processed the seeds into a dried paste used to brew a stimulating beverage. Today the seed powder and its extracts are used chiefly as a caffeine source in soft drinks, energy drinks, and dietary supplements.
both fingerprints on one instrument; where the marks line up the two compounds work the same lever, where a slot goes dark only one of them touches it. read straight from each entry's affinity table; nothing here is invented.
Blocks adenosine A1 and A2A receptors
antagonist
Raises dopamine and catecholamine signaling
Improves force production and lowers perceived exertion
increases
increases
increases
inhibits
strengths are the entries' qualitative ratings (strong / moderate / weak); Ki and EC50 figures appear where an entry records them.
easiest to source: Caffeine is currently listed by more trusted vendors (2), so it's the simpler one to get hold of. for effects and safety, read each full entry; this is educational, not medical advice.