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'''Kaféin''' atawa nyaéta hiji [[sanyawa kimia|sanyawa]] [[alkaloid]] [[stimulan]] [[psikoaktif]], kapanggih ku [[kimia]]wan [[Jérman]] [[Friedrich Ferdinand Runge]] taun [[1819]] (anjeunna ngistilahkeun ''kaffein'', zat kimia anu aya dina [[kopi]])<ref>{{cite web|url=http://dictionary.reference.com/browse/caffeine |title=caffeine - Definitions from Dictionary.com|accessdate=2009-08-03}}</ref>. Ieu zat téh ogé bagian tina campuran kimia '''guaranin''' nu aya dina [[guarana]], '''matéin''' nu aya dina maté, jeung '''téin''' nu aya dina [[entéh]]; kabéhanana ngandung [[alkaloid]] lian kayaning [[téofilin]] jeung [[téobromin]], stimulan jantung<ref name="Ref-1">{{cite book|author = Balentine D. A., Harbowy M. E. and Graham H. N.|title = Tea: the Plant and its Manufacture; Chemistry and Consumption of the Beverage|journal = Caffeine|year = 1998|editor = G Spiller}}</ref>.
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Pikeun awak [[manusa]], kaféin téh stimulan [[sistem saraf puseur]], nu balukarna sacara samentara bisa ngaleungitkeun rasa tunduh sarta ngaronjatkeun kawaspadaan. Kiwari, kaféin jadi [[zat psikoaktif]] nu panglobana dikonsumsi, utamana kusabab ieu zat mah teu dicaram konsumsina. Di Amérika Kalér, unggal poe 90% sawawa ngonsumsi kaféin<ref name="demon drink">{{cite journal|last = Lovett|first = Richard|title = Coffee: The demon drink?|journal = New Scientist|issue = 2518|date = 24 Séptémber 2005|url=http://www.newscientist.com/article.ns?id=mg18725181.700|accessdate=2009-08-03|format=fee required}}</ref>. Badan POM AS (FDA) ngadaptar kaféin salaku "''multiple purpose generally recognized as safe food substance''" (zat kadaharan multiguna nu sacara umum aman)<ref name="GRAS">{{cite web |url=http://edocket.access.gpo.gov/cfr_2003/aprqtr/21cfr182.1180.htm |title=21 CFR 182.1180 |accessdate=2009-08-03|date=2003-04-01 |work=U.S. [[Code of Federal Regulations]] |publisher=U.S. [[Office of the Federal Register]] |page=462}}</ref>.
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Kaféin mibanda pasipatan [[diurétik]], sahanteuna mun dibikeun ka nu teu [[toléransi obat|toléran obat]] kalawan dosis anu cukup<ref name="diuretic">{{cite journal|last=Griffin |first = R. J. |title=Caffeine ingestion and fluid balance: a review|journal=Journal of human nutrition and dietetics|issue=6|volume=16|year=2003|doi=10.1046/j.1365-277X.2003.00477.x|page=411}}</ref>. Sabalikna, pikeun nu geus biasa ngonsumsi mah toléransina beuki luat<ref name="diuretic"/>, sarta teu ngabalukarkeun déhidrasi<ref name="really">{{cite news|url=http://www.nytimes.com/2008/03/04/health/nutrition/04real.html?_r=1 |title=Really? The Claim: Caffeine Causes Dehydration|publisher= The New York Times|accessdate=2009-08-03}}</ref><ref name="armstrong2007">{{cite journal
| author = Armstrong LE, Casa DJ, Maresh CM, Ganio MS
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== Tumbu kaluar ==
=== Émbaran umum ===
* [http://home.howstuffworks.com/caffeine.htm How Stuff Works: "How Caffeine Works"]
* [http://www.erowid.org/chemicals/caffeine/caffeine.shtml Erowid Caffeine Vaults]
* [http://sxph.org/caffeine/ Highly Caffeinated: The Caffeine Information Archive"]
* [http://ngm.nationalgeographic.com/ngm/0501/feature1/ National Geographic January 2005: Caffeine]
* [http://www.caffeinezone.com Caffeine Zone: Social and Medical info on caffeine and its effects.]
* [http://www.thenakedscientists.com/html/columnists/dalyacolumn2.htm Naked Scientists Online: Why do plants make caffeine?]
* [http://www.physsportsmed.com/issues/1997/11nov/caffeine.htm ''The Physician and Sportsmedicine'': Caffeine: A User's Guide]
* [http://www.druglibrary.org/schaffer/Library/studies/cu/CU21.html The Consumers Union Report on Licit and Illicit Drugs, Caffeine-Part 1] [http://www.druglibrary.org/schaffer/Library/studies/cu/CU22.html Part 2]
* [http://www.npr.org/templates/story/story.php?storyId=6155178 Coffee: A Little Really Does Go a Long Way, NPR, [[September 28]], 2006]
* [http://www.express.co.uk/posts/view/4664/Does-coffee-really-give-you-a-buzz- Does coffee really give you a buzz? by John Triggs in the Daily Express April 17 2007]
* [http://chemsub.online.fr/chemsearch/cas_number_58-08-2.html Caffeine: ChemSub Online]
* [http://www.mayoclinic.com/health/caffeine/AN01211 How much caffeine is in your daily habit? (Caffeine content in common foods and drinks) by Mayo Clinic Staff October 2007]
* [http://www.camo.com/downloads/resources/application_notes/decaffeinated_coffee_NIR_spectroscopy.pdf How to determine caffeine in decaffeinated coffee by NIR spectroscopy]
=== Warta ===
* [http://historyofalcoholanddrugs.typepad.com/alcohol_and_drugs_history/caffeine/index.html Alcohol and Drugs History Society: Caffeine news page]
* [http://www.canada.com/nationalpost/news/story.html?id=30d6d514-1c68-441a-bbec-5b80ae23627f&k=45911 National Post: Caffeine linked to psychiatric disorders]
* [http://www.hopkinsmedicine.org/Press_releases/2004/09_29_04.html Caffeine Withdrawal Recognized as a Disorder]
=== Kawaluyaan ===
* [http://www.benbest.com/health/caffeine.html Is Caffeine a Health Hazard?]
* [http://www.emedicine.com/med/topic3115.htm eMedicine Caffeine-Related Psychiatric Disorders]
* [http://news.bbc.co.uk/2/hi/health/7326839.stm Protects brain from Alzheimer's?]
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[[ar:كافايين]]
Baris ka-86:
[[kn:ಕೆಫೀನ್]]
[[ko:카페인]]
[[lij:Caffeinna]]
[[lt:Kofeinas]]
[[lv:Kofeīns]]
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