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Friday 19th July 2019

Coffee shop caffeine variation

1st December 2011

Research has suggested that large variations in the amount of caffeine in cups served by High Street coffee shops could pose a risk to pregnant women.


Researchers from Glasgow University analysed espresso coffee from 20 shops and found one was six times stronger than others.

Too much caffeine can result in miscarriage or low birth rate, according to the Food Standards Agency (FSA).

Current advice to women expecting a baby is to consume no more than 200mg of caffeine a day.

Alan Crozier, senior research fellow in the faculty of medicine, who led the study said: “The analysis that we did showed the amount of caffeine ranged from 50mg per cup from Starbucks, up to over 300mg per cup from another coffee house, Patisserie Francoise.

“If you go to different coffee houses you can tell that some are much stronger than others. The problem comes with people who should have a limited caffeine intake."

Pregnant women metabolise caffeine much more slowly and those with liver disease do not have the enzymes to metabolise caffeine.

While there is a growing number of coffee shops opening, there is no information given about the caffeine contents of different types of coffee, say the researchers who published their findings in the Royal Society of Chemistry’s journal Food and Function.

Although the study focussed on espresso, other styles of coffee drink served are often prepared using shots of espresso.

“Our data shows that you can have the recommended amount - and more - from just one shot of espresso,” said Mr Crozier.


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