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caffeine
caffeine
A Dictionary of Food and Nutrition
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2005
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© A Dictionary of Food and Nutrition 2005, originally published by Oxford University Press 2005. (Hide copyright information)
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caffeine An
alkaloid (chemically trimethylxanthine) found in coffee and tea (when it is sometimes called theine). It raises blood pressure, stimulates the kidneys, and temporarily averts fatigue and tiredness, so has a stimulant action. It can also be a cause of insomnia in some people, and decaffeinated coffee and tea are commonly available.
Coffee beans contain about 1% caffeine, and the beverage contains about 70 mg/100 mL. Tea contains 1.5–2.5% caffeine, about 50–60 mg/100 mL of the beverage. Cola drinks contain 12–18 mg/100 mL, and some
energy drinks may contain more.
See also
coffee,
decaffeinated;
theobromine;
xanthine.
Cite this article
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Caffeine--induced psychiatric disorders.(Article 353: 1 Clock Hour)
Magazine article from: Journal of Continuing Education Topics & Issues; 4/1/2009; ; 700+ words
; Caffeine is a bitter, white crystalline xanthine...and a mild diuretic (1). In humans, caffeine is a central nervous system (CNS) stimulant...restoring alertness. Beverages containing caffeine, such as coffee, tea, soft drinks and...
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Caffeine breakdown: getting t-t-t-too much of a g-g-g-good thing? Here's how to cut back.
Magazine article from: Men's Fitness; 7/1/2002; ; 700+ words
; ...help burn fat, but taken excessively, caffeine can bring on a case of the jitters that...tolerance, so you need to monitor how your caffeine intake affects your energy level, sleep...Consult our breakdown, which includes some caffeine sources that may surprise you. HOT TEA...
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Caffeine allergy and premenstrual symptoms.(Letters to the Editor)
Magazine article from: Townsend Letter for Doctors and Patients; 11/1/2004; ; 700+ words
; Editor: Ongoing caffeine anaphylaxis is a masked cerebral allergy...The symptoms are associated with caffeine use, and allergic toxicity. Doctors...stability of relationships. (3,4) Caffeine is associated with the symptoms and...
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Is caffeine in pregnancy giving you the jitters?
Magazine article from: International Journal of Childbirth Education; 3/1/2007; ; 700+ words
; ...LeMasters, and Wilson 2004). The debate on caffeine consumption during pregnancy has been...Most government agencies state that caffeine in pregnancy is safe within certain dosages...researchers and physicians do not recommend any caffeine consumption during pregnancy. In this...
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Caffeine's hook.
Magazine article from: Current Health 2, a Weekly Reader publication; 1/1/1998; ; 700+ words
; ...can gives me 140 calories and a great caffeine lift," said John Grabrick of Little...don't like coffee or tea. But I like caffeine's jolt, so I started drinking Coke...days." When John was asked how much caffeine he gets every day, he checked the back...
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Caffeine consumption should have its limits
Magazine article from: Ontario Birchbark; 2/1/2003; ; 700+ words
; ...Almost 90 per cent of Canadians consume caffeine in beverages or food. Most people get their caffeine in coffee and tea, but it is also found...many headache medications. Common effects Caffeine is a nervous system stimulant. In moderate...
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Caffeine jitters: some safety questions remain. (includes related article)
Magazine article from: FDA Consumer; 12/1/1987; ; 700+ words
; CAFFEINE JITTERS: Some Safety Questions Remain...infancy to old age, it's hard to avoid caffeine. It's present naturally or as an added...that most Americans probably consume some caffeine every day. But is it a serious health...
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 "Albany Times Union (Albany, NY)")
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CAFFEINE IN COFFEE BREWS HEALTH CONCERN.(LIFE & LEISURE)
Newspaper article from: Albany Times Union (Albany, NY); 1/6/1995; 700+ words
; ...a particular ingredient of concern: caffeine, the powerful stimulant that's sometimes...chocolate, teas and pain relievers) contain caffeine, an organic compound found in the seeds...certain plants. Coffee contains lots of caffeine relatively speaking, and the drug does...
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Caffeine claims hard to swallow; Reputed to fight cellulite, hair loss.(FAMILY TIMES)
Newspaper article from: The Washington Times; 11/11/2007; 700+ words
; ...literally to bathe and clothe yourself in caffeine. A little Vanilla Toffee Spazzstick lip balm will put some caffeine on your kisser. Mints and shampoo...heat will activate fine capsules of caffeine woven into the fibers. The goal here...
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How caffeine works.
Newspaper article from: Knight Ridder/Tribune; 3/13/2007; 700+ words
; ...chances are that you have taken some caffeine today. Around 90 percent of Americans consume caffeine in one form or another every single day...take more than 300 milligrams (mg) of caffeine every day, making it America's most...
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Caffeine
Encyclopedia entry from: Gale Encyclopedia of Children's Health: Infancy through Adolescence
Caffeine Definition Caffeine is a drug that stimulates the central nervous system. Description Caffeine is found naturally in coffee, tea, and chocolate. Colas and some other soft drinks contain it. Caffeine also comes in tablet and capsule...
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Caffeine-related disorders
Encyclopedia entry from: Gale Encyclopedia of Mental Disorders
Caffeine-related disorders Definition Caffeine is a white, bitter crystalline alkaloid derived from coffee...its chemical formula being 1,3,7-trimethylxanthine. Caffeine is classified together with cocaine and amphetamines as an...
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caffeine
Book article from: The Oxford Companion to the Body
caffeine is a methylxanthine present in tea and...are present in common beverages, namely caffeine, theophylline , and theobromine . The...well-known soft drinks, also contain caffeine. The three compounds differ very little...
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Coffee
Encyclopedia entry from: Encyclopedia of Drugs, Alcohol, and Addictive Behavior
...Coffee is the world's most common source of CAFFEINE, providing a little more than half of all caffeine consumed daily. In the United States...widely in warm regions for commercial crops. Caffeine from coffee accounts for an estimated 125...
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Tea
Encyclopedia entry from: Encyclopedia of Drugs, Alcohol, and Addictive Behavior
...except for water, and provides over 40 percent of the world's dietary Caffeine. In the United States, caffeine from tea accounts for about 17 percent of caffeine consumed; per capita caffeine consumption from tea is about 35 milligrams...
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