A study from 2021 which claimed that the sugar tax reduced sugar consumption from soft drinks by 10% was retracted last week. It appears the 13 authors made an enormous cock up and the 'real' figure is a trivially small 2.7%.
This is not just any old bunch of researchers. They are conducting the official evaluation of the sugar tax and have been given £1.6 million of taxpayers’ money to do so. The same team has since produced a study claiming that the sugar tax reduced obesity among one group of girls but not among another group of girls and not among any boys (and obesity rates actually rose among all age groups), and a study claiming that it reduced tooth decay extractions among a subset of children who never drank many sugary drinks to begin with (I wrote about the latter last month). Almost unbelievably, they have a study in the pipeline that will claim that the sugar tax reduced childhood hospital admissions for asthma by more than 20 per cent!
The retraction casts further doubt on all these claims, partly because it raises serious questions about the team’s competence and partly because the reduction in sugar consumption attributed to the tax is now so tiny that any measurable difference in health outcomes is less plausible than ever.
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