New research shows how advertisements for junk foods are deliberately played at those times when children watch TV

Junk food ads are shown more frequently on TV at times when many children are watching, new Heart Foundation-funded research shows.

The research, led by the University of Adelaide’s Associate Professor Lisa Smithers and published in the Journal of Paediatrics and Child Health, also showed that children were exposed to twice as much unhealthy food advertising as healthy food advertising.

The research found that children would view more than 800 junk food ads each year, if they watched 80 minutes of television per day. By building a bespoke TV monitoring system, believed to be the first of its kind in the world, A/Prof Smithers’ team was able to capture an entire year’s worth of television and ads from one free-to-air commercial TV network in South Australia.

“This is the most robust data we’ve seen anywhere. It is the largest dataset ever used by health researchers for examining food advertising in Australia, and probably the world. Most research in this area is based on only a few days of data, and there are no Australian studies taking seasonality into account,” A/Prof Smithers said.

Thirty thousand hours of television containing more than 500 hours of food advertisements (almost 100,000 food ads) were logged during 2016. The Australian Guide to Healthy Eating was used to group food and beverages into healthy, discretionary (i.e. unhealthy) and other categories.

Some countries and regions have implemented children’s television advertising bans (Quebec, Canada), junk food advertising bans (Norway), and requirements to publish healthy eating messages when unhealthy foods are advertised (France).

Snack foods, crumbed/battered meats, takeaway/fast food and sugary drinks were among the most frequently advertised foods. During children’s peak viewing times, the frequency and duration of “discretionary” (ie, junk) food advertising was 2.3 times higher each hour than for healthy foods.

Across the year, discretionary food advertising peaked at 71 per cent of all food advertising in January, dropping to a low of 41 per cent in August.

“Diet-related problems are the leading cause of disease in Australia, and the World Health Organization has concluded that food marketing influences the types of foods that children prefer to eat, ask their parents for, and ultimately consume,” A/Prof Smithers said.

Some countries and regions have implemented children’s television advertising bans (Quebec, Canada), junk food advertising bans (Norway), and requirements to publish healthy eating messages when unhealthy foods are advertised (France). In Australia, all advertising during children’s TV programs is covered by the Children’s Television Standards. There are other codes developed by industry groups that aim to limit Australian children’s exposure to unhealthy food advertising, however these codes are voluntary.

There is also no process for routine, independent monitoring of children’s exposure to food advertising.

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