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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
    Is caffeine causing you problems? 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
  • Caffeine citrate (intravenous route) - Side effects uses
    Description Caffeine citrate injection is used to treat short-term apnea of prematurity when premature babies (infants between 28 and 32 weeks gestational age) stop breathing Apnea of prematurity is caused by the baby's breathing centers not being fully developed This medicine is available with or without your doctor's prescription
  • Butalbital, acetaminophen, and caffeine (oral route)
    Butalbital, acetaminophen, and caffeine combination is used to relieve symptoms of tension (or muscle contraction) headaches Butalbital belongs to the group of medicines called barbiturates
  • Caffeine (oral route) - Side effects dosage
    Caffeine tablets are used as an alertness aid to help you keep awake when you experience drowsiness or unusual tiredness or weakness Do not use this medicine as substitute for sleep Caffeine oral solution is used to treat short-term apnea of prematurity when premature babies (infants between 28 and 32 weeks gestational age) stop breathing
  • 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
  • Cafeína: ¿qué cantidad es excesiva? - Mayo Clinic
    Si consumes cafeína para despertarte y mantenerte activo, no eres el único Millones de personas consumen cafeína todos los días para mantenerse alerta y mejorar su concentración ¿Qué cantidad de cafeína es excesiva? Hasta 400 miligramos (mg) de cafeína al día se consideran seguros para
  • الكافيين: ما الكمية التي تمثل إفراطًا؟ - Mayo Clinic (مايو كلينك)
    إنَّ تناوُل ما يصل إلى 400 ميليغرام (ملغم) من الكافيين يوميًّا يكون آمنًا لمعظم البالغين تكون كمية الكافيين هذه موجودة تقريبًا في أربعة أكواب من القهوة المخمرة أو 10 علب من الكولا أو علبتَين من "مشروب الطاقة" ضع في





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