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咖啡因摄取量  

2013-02-09 01:08:54|  分类: 汽车 时尚 资讯 |  标签: |举报 |字号 订阅

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咖啡因摄取量

英国《每日邮报》归纳英、美、加多项研究,文章指出按照加拿大国家卫生部的标准,成年人每日摄取咖啡因的建议上限为400mg(毫克),一杯清茶有55毫克,罐装355ml的可乐有58毫克,而星巴克大杯装普通咖啡的咖啡因含量已经有330毫克,已是上限的八成多。报道又指,孕妇的咖啡因摄取上限为200毫克,十岁小童则为75毫克;摄取上限会因性别、基因或吸烟习惯而减少。去年美国全国因吸收过量提神食品(非药物或毒品)而被送入急诊室的案件达2万宗;其中有5起死亡事件,美国食物及药物管理局(FDA)已进行立案调查。

咖啡因摄取量 - allen同学 - 活在过去咖啡因摄取量 - allen同学 - 活在过去

Too much caffeine? A Starbucks 'Grande' coffee       星巴克的诞生地 ~~ 第一间的星巴克老店

咖啡因摄取量 - allen同学 - 活在过去

How much caffeine is too much? The Starbucks coffee with 'three quarters of the safe daily dose' in one cup          By Alex Gore         PUBLISHED: 22:06 GMT, 6 February 2013 | UPDATED: 10:26 GMT, 7 February 2013

400mg of caffeine is the recommended daily allowance for average person

16oz Starbucks 'Grande' contains 330mg, according to study

But scientists stress that tolerance levels of the stimulant can vary widely

A large cup of Starbucks coffee contains more than three quarters of a person's 'safe' daily dose of caffeine, according to a report.

The 16oz 'Grande' coffee is said to contain nearly double the recommended limit for a pregnant woman, while a typical home-made 8oz cup of coffee is well above a 10-year-old's daily allowance.

But scientists stress that such statistical averages can vary widely from person to person, with factors such as gender and genetics having an impact on tolerance levels.

咖啡因摄取量 - allen同学 - 活在过去  

Caffeine: Table shows a range of drinks in order of caffeine content and their relation to daily allowances

A person's tolerance can also be affected by other drug use, with women who take the contraceptive pill breaking down caffeine slower, and smokers process the stimulant faster than non-smokers.

A study by the government regulatory agency Health Canada concluded that the average person can have up to 400mg of caffeine a day without experiencing negative affect, such as anxiety or heart problems.

The average allowance for a pregnant woman is 200mg, according to the Food Standards Agency, and 75mg for a 10-year-old.

A 16oz Starbucks coffee has 330mg of caffeine, according to a table compiled by Chemical and Engineering News.

However, Starbucks deny the findings, saying their Grande contains just 140mg - still more than a third of the daily recommended limit.

This is compared to an 8oz cup of brewed coffee, which contains 133mg, and an 8oz cup of instant coffee, which has 93mg.

An 8oz can of Monster Energy has 92mg, while an 8oz Red Bull can has 83mg. A bottle of Coca-Cola contains 58mg of caffeine, while a an 8oz cup of decaf coffee has 5mg and hot chocolate has 9mg.

University of Florida's director of forensic toxicology, Bruce A. Goldberger, told Chemical and Engineering News: 'People often don’t understand the potential risk of these beverages.

'Caffeine is a stimulant and, when consumed at high enough levels, can have negative effects.'

A fatal dose of caffeine is thought to be around 10g - equivalent to around 75 8oz cups of coffee or 120 cans of red bull consumed within a few hours.

A report released in the U.S. last month by the Substance Abuse & Mental Health Services Administration showed the annual number of emergency room visits associated with energy drinks jumped 36 per cent to 20,000 in 2011 compared to the previous year.

The U.S. Food and Drug administration also announced last year that it is investigating reports of five deaths being linked to Monster Energy drinks. The company has denied any link.

The family of U.S. teenager Anais Fournier, who died in 2011 from a heart attack brought on by 'caffeine toxicity' after drinking two 24-ounce Monster cans within 24 hours are suing the company.

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