Study suggests pregnant women should avoid caffeine altogether

Women who are pregnant or trying for a baby should consider avoiding caffeine altogether, research has suggested.

Current guidance on the NHS website suggests pregnant women should limit the amount of caffeine they consume to 200 milligrams a day.

However, a new study concludes that pregnant women – or those trying for a baby – should avoid caffeine completely.

Caffeine is found naturally in some foods and drinks, such as tea, coffee and chocolate. It is also added to some energy drinks, cold and flu remedies and some soft drinks.

The new study, published in the journal BMJ Evidence Based Medicine, examined data from 37 observational studies.

The research, by Professor Jack James, of Reykjavik University in Iceland, found that 32 of these studies reported that caffeine significantly increased risk of adverse pregnancy outcomes including stillbirth, miscarriage and low birth weight. He also cited an increased risk of childhood acute leukaemia and children being overweight or obese when born to mothers who consume caffeine during pregnancy.

Prof James wrote: “Current advice such as that issued by... the NHS is not consistent with the level of threat indicated by biological plausibility of harm and extensive empirical evidence of actual harm. Accordingly, current health recommendations concerning caffeine consumption during pregnancy are in need of radical revision.”

Daghni Rajasingham, consultant obstetrician and spokesperson for the Royal College of Obstetricians and Gynaecologists, said: “The findings of this study add to the large body of evidence that supports limited caffeine intake during pregnancy, but pregnant women do not need to completely cut out caffeine, as this paper suggests...

“The Royal College of Obstetricians and Gynaecologists’ advise to limit caffeine intake to 200 milligrams per day – the equivalent to two cups of instant coffee – still stands. This paper does not supersede all the other evidence.”