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16 Jul 09

BBC NEWS | Magazine | How much is too much coffee?

  • The Department of Health (DoH) advises people not to drink more than five single espressos - roughly seven instant coffees - a day, although individuals vary in their sensitivity.
  • The highest natural caffeine content is found in filter coffee, a mug of which contains about 120mg of caffeine. Instant coffee contains roughly 75mg and espresso 107mg.
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Caffeine - Health & Wellbeing

  • Green tea and black tea contain the same amount of caffeine, as both come from the Camellia sinensis plant. Red tea or Rooibus tea comes from a different plant and contains no caffeine. According to the National Drug and Alcohol Research Centre at the University of New South Wales, the caffeine content of a typical 150 ml cup of tea varies from 30 to 100 mg, depending on how long the tea is infused and whether you brew with loose leaves or tea bags (strong loose-leaf tea yields the most caffeine).
  • Coffee beans come in two flavours, Robusta and Arabica. Lighter-coloured Robusta coffee beans contain more caffeine (2 per cent) than Arabica (1 per cent) as the roasting process removes some of the caffeine. A 150 ml cup of drip-percolated coffee has a typical caffeine content of 100 to 150 mg; instant coffee has 60– 100mg per 150 ml, depending on the brand. An espresso comes in at around 90 mg per 150 ml.
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