CAFFEINE
What is caffeine?
Caffeine is a stimulant found in coffee, tea, chocolate, and cola and energy drinks – making it oneof the most widely used drugs in the world.Caffeine concentration varies acco
rding to the plant variety, the growing conditions and the strength of the given brew.Coffee beans of the arabica strain, grown primarily in Central and South America contain approximately 1% caffeine. Robusta coffee beans, grown in Africa and Indonesia, contain about 2%. The caffeine content of tea leaves can be as high as 5%. Although tea leaves generally contain more caffeine by weight than coffee beans, there is usually more caffeine in a cup of coffee than in a cup of tea because more coffee beans than tea leaves are used to make each regular cup. Also tea is infused, not boiled.
Most researchers now agree that there is little risk of harm when a person consumes less than 600 mg of caffeine a day. At times of anxiety or stress, or during pregnancy, many doctors now recommend consumption of less than 200 mg a day. Now lets see caffeine on food and drink
How many people use caffeine?
Worldwide per capita caffeine consumption (including that of children) is estimated to be 70 mg perday, or approximately equivalent to one cup of coffee. Average intake for Americans is believed to be about 200 mg per day. Most Australians consume caffeine in one way or another. A survey conducted in Sydney in the mid 1980s found that the average daily intake of caffeine was about 240 mg – the equivalent of about four cups of instant coffee.
What are the long-term effects of caffeine?
Daily use of caffeine in low to moderate doses in most healthy adults does not appear to produce
any harmful effects. Substantial daily doses – and in some people even as little as 250 mg per day – can lead to unpleasant effects such as:
• restlessness
• nervousness
• insomnia
• flushed face
• increased urination
• stomach upsets
• muscle twitching
What is caffeine?
Caffeine is a stimulant found in coffee, tea, chocolate, and cola and energy drinks – making it oneof the most widely used drugs in the world.Caffeine concentration varies acco
rding to the plant variety, the growing conditions and the strength of the given brew.Coffee beans of the arabica strain, grown primarily in Central and South America contain approximately 1% caffeine. Robusta coffee beans, grown in Africa and Indonesia, contain about 2%. The caffeine content of tea leaves can be as high as 5%. Although tea leaves generally contain more caffeine by weight than coffee beans, there is usually more caffeine in a cup of coffee than in a cup of tea because more coffee beans than tea leaves are used to make each regular cup. Also tea is infused, not boiled.Most researchers now agree that there is little risk of harm when a person consumes less than 600 mg of caffeine a day. At times of anxiety or stress, or during pregnancy, many doctors now recommend consumption of less than 200 mg a day. Now lets see caffeine on food and drink
How many people use caffeine?
Worldwide per capita caffeine consumption (including that of children) is estimated to be 70 mg perday, or approximately equivalent to one cup of coffee. Average intake for Americans is believed to be about 200 mg per day. Most Australians consume caffeine in one way or another. A survey conducted in Sydney in the mid 1980s found that the average daily intake of caffeine was about 240 mg – the equivalent of about four cups of instant coffee.
What are the long-term effects of caffeine?
Daily use of caffeine in low to moderate doses in most healthy adults does not appear to produce
any harmful effects. Substantial daily doses – and in some people even as little as 250 mg per day – can lead to unpleasant effects such as:
• restlessness
• nervousness
• insomnia
• flushed face
• increased urination
• stomach upsets
• muscle twitching
(from NDRAC, Caffeine)
Senin, 15 Februari 2010
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