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caffeine    音标拼音: [kæf'in]
n. 咖啡因,茶精(兴奋剂)

咖啡因,茶精(兴奋剂)

caffeine
n 1: a bitter alkaloid found in coffee and tea that is
responsible for their stimulating effects [synonym: {caffeine},
{caffein}]

caffein \caf*fe"in\, Caffeine \Caf*fe"ine\, n. [Cf. F.
caf['e]ine. See {Coffee}.] (Chem.)
A white, bitter, crystallizable substance, found in coffee
and tea. It is identical with the alkaloid {theine} from tea
leaves, and with {guaranine} from guarana. It is responsible
for most of the stimulating effect of coffee or tea.
[1913 Webster WordNet 1.5]

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  • Caffeine: How much is too much? - Mayo Clinic
    Caffeine has its perks, but it can pose problems too Find out how much is too much and if you need to cut down
  • Caffeine content for coffee, tea, soda and more - Mayo Clinic
    Find out how much caffeine is in coffee, tea, soda and energy drinks You may be getting more caffeine than you think you are
  • Caffeine: Is it dehydrating or not? - Mayo Clinic
    As a chemical, caffeine increases production of urine, which means caffeine is a diuretic But most research suggests that the fluid in caffeinated drinks balances the diuretic effect of typical caffeine levels High doses of caffeine taken all at once may increase the amount of urine the body makes This is more likely if you aren't used to
  • Caffeine: How does it affect blood pressure? - Mayo Clinic
    How does caffeine affect blood pressure? Caffeine may cause a brief rise in your blood pressure, even if you don't have high blood pressure This short-term spike in blood pressure happens mainly in people who don't drink caffeine often, rather than in those who do Still, the blood pressure response to caffeine differs from person to person
  • Coffee and health: What does the research say? - Mayo Clinic
    Some benefits are linked to caffeine Other benefits are related to the other components in coffee But in general, studies find that coffee is linked to health in many ways Drinking coffee may be linked to a lower risk of: Parkinson's disease, type 2 diabetes and Alzheimer's disease among some groups of people Metabolic syndrome and chronic kidney disease Liver cancer and liver disease
  • Caffeine: Does it affect blood sugar? - Mayo Clinic
    For some people with diabetes, one cup of coffee may raise or lower blood sugar Learn how caffeine can affect blood sugar
  • Cafeína: ¿cuánto es demasiado? - Mayo Clinic
    La cafeína tiene sus ventajas, pero también puede plantear problemas Descubra cuánto es demasiado y si necesita reducir el consumo
  • Contenido de cafeína en el café, el té, las gaseosas y otras bebidas
    Lieberman HR, et al Daily patterns of caffeine intake and the association of intake with multiple sociodemographic and lifestyle factors in U S adults based on the NHANES 2007-2012 surveys
  • 咖啡、茶、碳酸饮料等中的咖啡因含量 - 妙佑医疗国际
    Lieberman HR, et al Daily patterns of caffeine intake and the association of intake with multiple sociodemographic and lifestyle factors in U S adults based on the NHANES 2007-2012 surveys
  • Butalbital, acetaminophen, caffeine, and codeine (oral route)
    Description Butalbital, acetaminophen, caffeine, and codeine combination is used to relieve symptoms of tension (or muscle contraction) headaches Extended and repeated use of this product is not recommended Butalbital belongs to the group of medicines called barbiturates They act in the central nervous system (CNS) to produce their effects Acetaminophen is used to relieve pain and reduce





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