The United States exports obesity
Left unchecked, rapidly rising obesity rates could slow or even reverse the dramatic gains in health and life expectancy that much of the world has enjoyed over the past few decades. And by forcing its food culture on countries like Mexico and Canada, the United States is making the problem worse.
One of the paradoxes of modern global capitalism is that whereas more than 800 million people in the world do not have enough to eat, an estimated 700 million people (including 100 million children) are obese. Of course, the two are not necessarily directly related. A considerable proportion of world hunger occurs in countries suffering from domestic strife or severe government dysfunction.
The obesity epidemic, however, has a much broader footprint, affecting advanced economies and most emerging markets. Although there is some connection between obesity and poverty within countries, it is notable that obesity rates in rich countries such as the US, the United Kingdom, and Canada are among the world’s highest.
Recently, the US Centres for Disease Control estimated that a stunning 40 per cent of all Americans are obese (defined as having a body mass index of 30 or higher).
Obesity rates are soaring in Europe, Latin America, and even in China.
There is abundant evidence that obesity contributes significantly to higher rates of type-2 diabetes, heart attacks, and certain types of cancer. The health costs are staggering, estimated to be close to US$200 billion per year in the US alone. And with rising childhood obesity rates worldwide portending significantly greater health problems in the future adult population, the costs are likely to rise considerably.
The causes of obesity are manifold and complex. Nevertheless, a growing body of evidence suggests that a culture emphasising processed food and a generally sedentary lifestyle lies at the centre of the problem. In emerging markets, rapid urbanisation is another important factor, as well as a desire to emulate Western lifestyles.
Many governments have launched initiatives to improve nutrition education. Unfortunately, industry advertising typically dwarfs these efforts, as do US trade lobbyists’ own efforts to push processed and fast food on the rest of the world.
It is hard to ignore the fact that Mexico’s adult obesity rate has soared since the adoption in 1993 of the North American Free Trade Agreement. While there are many causes, POST-NAFTA direct foreign investment in the processed food industry and a surge in advertising are important contributors.
Mexican consumption of sugary beverages nearly tripled between 1993 and 2014, and a new tax on sugary drinks has muted demand only slightly since then. The other NAFTA partner, Canada, has similarly experienced a rise in obesity, partly because US imports have led to a sharp decline in the price of fructose.
It is unfortunate that government regulators have been so slow to try to reverse these trends by, for example, helping to educate the public on the science of nutrition. And, for too long, most government anti-obesity education has focused on regulating calorie intake, without taking into account that different foods have dramatically different effects on appetite.
The government has other tools at its disposal, besides education, for affecting people’s eating habits. They can and should place greater restrictions on advertising to children, as the UK, France, and several other countries have done; obesity in early years can lead to lifelong problems. Beyond that, instituting a tax on processed food could help.
Countries negotiating new agreements with the US must be wary of any provisions that tie their hands in the war against obesity.
❚ Kenneth Rogoff, a former chief economist of the International Monetary Fund, is Professor of Economics and Public Policy at Harvard University.