Eleanor Wheeler

Eleanor Wheeler

Addressing obesity: the role of policy in creating healthier populations

4 March 2025

Illustration of a public park, from above. People are shown walking on paths, cycling on dedicated cycle paths, having picnics on the grass and sitting on benches. At the top of the image there is a playground with many children playing on equipment, as well as cycling, skateboarding and riding scooters on a dedicated track.

Obesity is not the result of poor lifestyle choices; it’s emblematic of the broken systems that prioritise profit over health.

It is estimated that, by 2035, around 4 billion people will be living with overweight or obesity, representing around half the world’s population. The World Obesity Atlas 2023 predicts that the economic impact of overweight and obesity, in terms of both healthcare costs and productivity, will be around $4.32 trillion in in 2035 – almost 3% of global GDP.

The systemic roots of overweight and obesity

Many factors are associated with an increased risk of overweight and obesity. They include biology and genetics, which can make people susceptible to weight gain; certain health conditions; obesogenic environments, which make weight gain more likely; the easy availability of high-calorie food; limited access to healthcare; and, importantly, marketing practices.

But a pervasive misconception – that obesity is a consequence of lifestyle choices – has limited dialogue about its prevention and management.

The World Obesity Day campaign slogan, ‘changing systems, healthier lives’, highlights the importance of focusing less on individuals and more on systems – health systems, governments, food systems, the media and our built environments – to reverse rising rates of obesity. But what sorts of changes are needed, and how can policy be leveraged to realise system-level change?

Using policy to address obesity

The complex interplay between the causes of obesity requires broad multi-sectoral strategies for prevention and care. Many organisations are calling for both system change and a shift in the public narrative; the World Health Organization’s (WHO’s) acceleration plan to stop obesity states that ‘tackling obesity must be recognised first as a societal rather than an individual responsibility’.

Policy can be used to drive change in society and systems. For example, the WHO’s acceleration plan includes fiscal policies such as taxing sugar-sweetened beverages; interventional policies addressing school-based nutrition; promotion and support for breastfeeding; and setting standards on physical activity in schools.

A US study found that almost 60% of supermarket promotions were for processed products.

 

Moving away from ultra-processed foods

Food systems are often heavily influenced by profit-driven industries, but strong policy can successfully push these industries to shift their marketing practices as well as the nutritional make-up of foods – particularly ultra-processed foods (UPFs), which are industrially processed to be highly profitable, convenient and hyper-palatable.

UPFs are not only widely available, but are also marketed far more aggressively than healthier foods. A US study found that almost 60% of supermarket promotions were for processed products. There is also growing concern about the increasing proportion of ultra-processed foods that babies and toddlers are exposed to; in some countries, including the UK and Canada, UPFs account for around 50% of daily calorie intake for these age groups.

Mexico has successfully developed a clear policy around food labelling and marketing. The law incentivises producers to reformulate their products to be healthier, provide clearer information to consumers about less-healthy foods, and reduce the lure of unhealthy foods – particularly to children. Cartoon mascots on unhealthy food products were banned in 2018, and starting in 2020 the country required front-of-packet nutrition labels on all products with ‘excess’ sugar, calories, salt or saturated fat.

Addressing inequitable access to healthy choices

Another well-recognised issue is that, despite considerable investment in public awareness and education campaigns, many people find it difficult to eat healthily due to factors such as the low availability and high cost of heathier foods. For example, obesity risk factors have long been linked to social disadvantage. And prevention strategies are not always informed by the social determinants of health when they are adapted for the local level.

To address the issue, a pilot project in Belgium is working with healthcare and anti-poverty organisations, as well as organisations linked to food production and distribution, to try to foster a common vision on the future of food. The programme aims to increase the availability of healthy, sustainable and ethical food through investment in the food supply chain, and to improve access to healthy food.

This has been achieved by providing participants in the pilot community with a credit card containing €150 per month to spend on food. The foods that can be purchased on the card are chosen democratically by participants; there is an emphasis on improving access to local and sustainable food and excluding UPFs. A report on the pilot outcome showed that participants were able to purchase a wider range of fresh fruit and vegetables, and that this increased their consumption of these foods.

Shaping the built environment

In addition to access to healthy foods, the built environment should be a key policy consideration. Where people live influences, and often limits, their behaviour. For example, urban sprawl often makes people more dependent on cars and hinders opportunities to walk or cycle – with more walkable environments linked to lower levels of obesity.

Image showing two men walking with a bicycle, and a woman walking in the background, on a pedestrianised area of ground in front of a large building.

One town in Minnesota, US, changed its built environment by adding walking routes and pedestrian crossings; there was a 96% increase in pedestrian traffic over four years.

In the US, the Blue Zones Project worked with the city of Albert Lea, Minnesota, to apply lessons from around the world about how to help residents live healthier lives. This included changing the built environment by adding walking routes and pedestrian crossings.

Albert Lea also expanded community garden spaces to increase access to healthy foods. When shops and restaurants began offering healthier choices, an increase in water sales and a reduction in soda sales were observed. The town also banned the use of tobacco in bars, public parks, outdoor restaurants and other areas.

The population of Albert Lea has seen significant health benefits; there was a 96% increase in pedestrian traffic over four years, participating residents added 2.9 years to their projected life expectancy, and there was a drop in obesity rates. The changes to the built environment also delivered savings of $8.6 million in annual healthcare costs as a result of the decline in smoking, drove an increase in tourism, and boosted growth and development in the town.

Investing in healthier futures

Developing and enacting policies that drive system-level changes is undeniably complex. However, it is clear that such policies can be beneficial not only in terms of obesity prevention and management, but also for communities more broadly.

Healthier futures are possible. And from a policymaking perspective, it is important to take a long-term view to achieving this – a comprehensive lifespan approach to promoting health, and one which understands that funding large-scale, cross-sectoral and multi-system policy interventions is an investment in health that can pay large and lasting dividends.

 

The opinions expressed in this blog are those of the author and do not necessarily represent the views of The Health Policy Partnership.
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