Limiting the hours of television advertising for foods and beverages high in fat, sugar and salt (HFSS) could make a meaningful contribution to reducing childhood obesity, according to a new study published this week in PLOS Medicine by Oliver Mytton of the University of Cambridge, UK, and colleagues.
Childhood obesity is a global problem with few signs of progress. As part of the UK government's plan to halve childhood obesity by 2030, it is considering limitations on television advertising for HFSS products between the hours of 5:30am and 9pm. In the new study, researchers used data on children's exposure to HFSS advertising during these hours, as well as previously published information on the association between exposure to HFSS advertising and children's caloric intake.
The study concluded that if all HFSS advertising in the UK was withdrawn during the hours in question, the 3.7 million children in the UK would see on average 1.5 fewer HFSS advertisements per day and decrease their caloric intake by an average of 9.1 kcal (95%CI 0.5-17.7). This would reduce the number of children aged 5 through 17 with obesity by 4.6% (95%CI 1.4-9.5) and the number of children considered overweight by 3.6% (95%CI 1.1-7.4). This is equivalent to 40,000 fewer UK children with obesity and 120,000 fewer classified as overweight and would result in a monetary benefit to the UK of £7.4 billion (95%CI 2.0 billion-16 billion). The study only considered the direct impact of HFSS advertising on children's caloric intake and did not consider the impact of HFSS advertising on changing both children's and adults' dietary preferences and habits.
"Measures which have the potential to reduce exposure to less-healthy food advertising on television could make a meaningful contribution to reducing childhood obesity," the authors say. However, they also point out that "this is a modeling study and we cannot fully account for all factors that would affect the impact of this policy if it was implemented."
"Our analysis shows that introducing a 9 PM watershed on unhealthy TV food advertising can make a valuable contribution to protecting the future health of all children in the UK, and help level up the health of children from less affluent backgrounds," said Dr Mytton. "However, children now consume media from a range of sources, and increasingly from online and on-demand services, so in order to give all children the opportunity to grow up healthy it is important l to ensure that this advertising doesn't just move to the 9-10pm slot and to online services."
Peer reviewed; Experimental study; People
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Funding: This study did not receive any specific funding. OM is an NIHR Clinical Lecturer. MO is funded under the British Academy Postdoctoral Fellowship scheme. JA has received funding from the Centre for Diet and Activity Research (CEDAR), a UKCRC Public Health Research Centre of Excellence (RES?590?28?0002); within this funding from the British Heart Foundation, Department of Health, Economic and Social Research Council, Medical Research Council and the Wellcome Trust, under the auspices of the UK Clinical Research Collaboration, is gratefully acknowledged. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Competing Interests: I have read the journal's policy and the authors of this manuscript have the following competing interests: RV MO RS KS report a grant for the Obesity Policy Research Unit, funded through the National Institute for Health Research (NIHR) to inform the work of the Department for Health and Social Care; OM was an advisor to the Health Select Committee during their inquiry into childhood obesity (2017-18).
Citation: Mytton OT, Boyland E, Adams J, Collins B, O'Connell M, Russell SJ, et al. (2020) The potential health impact of restricting less-healthy food and beverage advertising on UK television between 05.30 and 21.00 hours: A modelling study. PLoS Med 17(10): e1003212. https://doi.org/10.1371/journal.pmed.1003212