News tagged with caffeine
Getting caffeine fix as easy as taking deep breath
(AP) -- Move over, coffee and Red Bull. A Harvard professor thinks the next big thing will be people inhaling their caffeine from a lipstick-sized tube. Critics say the novel product is not without its risks.
Feb 08, 2012 |
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Coffee consumption reduces fibrosis risk in those with fatty liver disease
Caffeine consumption has long been associated with decreased risk of liver disease and reduced fibrosis in patients with chronic liver disease. Now, newly published research confirms that coffee caffeine consumption reduces ...
Feb 02, 2012 |
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New study shows caffeine consumption linked to estrogen changes
Asian women who consumed an average of 200 milligrams or more of caffeine a day—the equivalent of roughly two cups of coffee—had elevated estrogen levels when compared to women who consumed less, according to a ...
Jan 26, 2012 |
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Energy drink abuse highest among teens
(Medical Xpress) -- A recent study has revealed a dramatic increase in the number of calls to a poisons hotline relating to caffeine toxicity from energy drink consumption.
Jan 19, 2012 |
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Does caffeine enhance exercise performance? The debate continues
Caffeine is regarded by some as being a potent stimulant, but the debate continues as to whether it enhances exercise performance. A range of expert opinions capture the scope of this ongoing debate in an ...
Dec 14, 2011 |
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Federal study: ER visits related to highly caffeinated drinks up tenfold
Emily Marchant had a can of Red Bull at her elbow as she went over an assignment in a Harper College library carrel. She is a long-standing fan of the beverage, she said, usually drinking one a day when she needs a boost.
Dec 07, 2011 |
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Pregnant women at risk from high street coffee shops
High street coffee chains are unwittingly putting pregnant women at risk due to huge variations in their caffeine content.
Dec 02, 2011 |
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Chemistry professor links feces and caffeine
Researchers led by Prof. Sébastien Sauvé of the University of Montreal's Department of Chemistry have discovered that traces of caffeine are a useful indicator of the contamination of our water by sewers. "E co ...
Nov 22, 2011 |
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Jonesing for java: Could caffeine use predict risk for cocaine abuse?
Parents of young caffeine consumers take heed: that high-calorie energy drink or soda might present more than just obesity risk. In fact, according to a double-blind, placebo-controlled study that examined responses to stimulants, ...
Oct 07, 2011 |
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Increased caffeinated coffee consumption associated with decreased risk of depression in women
The risk of depression appears to decrease for women with increasing consumption of caffeinated coffee, according to a report in the September 26 issue of Archives of Internal Medicine.
Sep 26, 2011 |
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More evidence that caffeine lowers risk of skin cancer
There might be a time when instead of just drinking that morning cup of coffee you lather it on your skin as a way of preventing harmful sun damage or skin cancer.
Aug 15, 2011 |
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Researcher finds caffeine consumption, female infertility link
Caffeine reduces muscle activity in the Fallopian tubes that carry eggs from a woman's ovaries to her womb. "Our experiments were conducted in mice, but this finding goes a long way towards explaining why drinking caffeinated ...
Jul 20, 2011 |
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Caffeine promotes drink flavor preference in adolescents
Research to be presented at the upcoming annual meeting of the Society for the Study of Ingestive Behavior (SSIB), the foremost society for research into all aspects of eating and drinking behavior, indicates that caffeine ...
Jul 12, 2011 |
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Mystery ingredient in coffee boosts protection against Alzheimer's disease
A yet unidentified component of coffee interacts with the beverage's caffeine, which could be a surprising reason why daily coffee intake protects against Alzheimer's disease. A new Alzheimer's mouse study by researchers ...
Jun 21, 2011 |
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Researchers identify caffeine-consuming bacterium
As it turns out, humans aren't the only organisms that turn to caffeine for a pick-me-up. University of Iowa scientists have identified four different bacteria that actually can live on caffeine.
Jun 07, 2011 |
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Caffeine
Caffeine is a bitter, white crystalline xanthine alkaloid that is a psychoactive stimulant drug. Caffeine was discovered by a German chemist, Friedrich Ferdinand Runge, in 1819. He coined the term "kaffein", a chemical compound in coffee, which in English became caffeine. Caffeine is also part of the chemical mixtures and insoluble complexes guaranine found in guarana, mateine found in mate, and theine found in tea; all of which contain additional alkaloids such as the cardiac stimulants theophylline and theobromine, and often other chemicals such as polyphenols which can form insoluble complexes with caffeine.
Caffeine is found in varying quantities in the beans, leaves, and fruit of some plants, where it acts as a natural pesticide that paralyzes and kills certain insects feeding on the plants. It is most commonly consumed by humans in infusions extracted from the cherries of the coffee plant and the leaves of the tea bush, as well as from various foods and drinks containing products derived from the kola nut. Other sources include yerba mate, guarana berries, and the Yaupon Holly.
In humans, caffeine is a central nervous system (CNS) stimulant, having the effect of temporarily warding off drowsiness and restoring alertness. Beverages containing caffeine, such as coffee, tea, soft drinks, and energy drinks enjoy great popularity. Caffeine is the world's most widely consumed psychoactive substance, but unlike many other psychoactive substances it is legal and unregulated in nearly all jurisdictions. In North America, 90% of adults consume caffeine daily. The U.S. Food and Drug Administration lists caffeine as a "Multiple Purpose Generally Recognized as Safe Food Substance".
Caffeine has diuretic properties, at least when administered in sufficient doses to subjects who do not have a tolerance for it. Regular users, however, develop a strong tolerance to this effect, and studies have generally failed to support the common notion that ordinary consumption of caffeinated beverages contributes significantly to dehydration.
For more information about Caffeine, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
