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The Advertising Association, ISBA and Outsmart have published a review by SLG Economics of research studies by PLOS Medicine and the International Journal of Behavioural Nutrition and Physical Activity on the effectiveness of the ban on HFSS advertising on the TfL estate in 2019.
The PLOS study reports that the ban led to a 1000 calorie reduction per week in the energy intake of the average weekly household in London.
But SLG Economics believes this over-estimates the effect of the ban and that numerous questions and concerns mean that the study should not, on its own, be relied on to support policies to ban HFSS ads.
This report has been updated as of September 14 2022 to include a review of the second study.
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