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Worldwide Obesity Dynamics and Their Determinants International Journal of Obesity (2004) 28, S2–S9 & 2004 Nature Publishing Group All rights reserved 0307-0565/04 $30.00 www.nature.com/ijo PAPER The nutrition transition: worldwide obesity dynamics and their determinants BM Popkin1* and P Gordon-Larsen1 1Department of Nutrition, Schools of Public Health and Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA OBJECTIVE: This paper explores the major changes in diet and physical activity patterns around the world and focuses on shifts in obesity. DESIGN: Review of results focusing on large-scale surveys and nationally representative studies of diet, activity, and obesity among adults and children. SUBJECTS: Youth and adults from a range of countries around the world. MEASUREMENTS: The International Obesity Task Force guidelines for defining overweight and obesity are used for youth and the body mass index Z25 kg/m2 and 30 cutoffs are used, respectively, for adults. RESULTS: The nutrition transition patterns are examined from the time period termed the receding famine pattern to one dominated by nutrition-related noncommunicable diseases (NR-NCDs). The speed of dietary and activity pattern shifts is great, particularly in the developing world, resulting in major shifts in obesity on a worldwide basis. Data limitations force us to examine data on obesity trends in adults to provide a broader sense of changes in obesity over time, and then to examine the relatively fewer studies on youth. Specifically, this work provides a sense of change both in the United States, Europe, and the lower- and middle-income countries of Asia, Africa, the Middle East, and Latin America. CONCLUSION: The paper shows that changes are occurring at great speed and at earlier stages of the economic and social development of each country. The burden of obesity is shifting towards the poor. International Journal of Obesity (2004) 28, S2–S9. doi:10.1038/sj.ijo.0802804 Keywords: youth obesity; nutrition transition; obesity trend Introduction demographic transitionFthe shift from a pattern of high Over the past 15 y, there has been increasing evidence that fertility and mortality to one of low fertility and mortality the structure of dietary intakes and the prevalence of obesity (typical of modern industrialized countries). The second is around the developing world have been changing at an the epidemiological transition, first described by Omran:2 increasingly rapid pace.1 In many ways, these shifts are a the shift from a pattern of high prevalence of infectious continuation of large-scale changes that have occurred diseaseFassociated with malnutrition, periodic famine, and repeatedly over time; however, we will assert and show that poor environmental sanitationFto one of high prevalence the changes facing low- and moderate-income countries of chronic and degenerative diseaseFassociated with urban– appear to be very rapid. While initially these shifts were felt industrial lifestyles.3 to be limited to higher-income urban populations, it is The nutrition transition is closely related to the demo- increasingly clear that these are much broader trends graphic and epidemiologic transitions. Large shifts have affecting all segments of society. occurred in diet and in physical activity patterns, particularly Two historic processes of change occur simultaneously in the last one or two decades of the 20th century. Modern with, or precede, the ‘nutrition transition’. One is the societies seem to be converging on a diet high in saturated fats, sugar, and refined foods but low in fiberFoften termed the ‘Western diet’Fand on lifestyles characterized by lower *Correspondence: Professor BM Popkin, Carolina Population Center, CB levels of activity. These changes are reflected in nutritional &hash; 8120 University Square, University of North Carolina at Chapel Hill, Chapel Hill, NC 27516-3997, USA. outcomes, such as changes in average stature, body composi- E-mail: [email protected] tion, and morbidity. Worldwide obesity dynamics and their determinants BM Popkin and P Gordon-Larsen S3 The last three stages of the nutrition transition are Edible oil described in more detail in Figure 1. In Stage 3, famine Elsewhere we have provided evidence of the rapid increases begins to recede as income rises. In Stage 4, changes in diet in edible oil at the national and household level throughout and activity pattern lead to the emergence of new disease the developing world. In many developing countries, problems and increased disability. In Stage 5, behavioral dietary change has begun with major increases in change begins to reverse the negative tendencies and make domestic production and imports of oilseeds and vegetable possible a process of ‘successful aging’.4,5 The changes are all oilsFrather than animal source products or caloric sweet- driven by a range of factors, including urbanization, eners. For instance, between 1991 and 1996/7, global economic growth, technical change, and culture. For con- production of vegetable fats and oils rose from 60 to 71 venience, the patterns can be thought of as historical million metric tons.9 In contrast, the production of visible developments; however, ‘earlier’ patterns are not restricted animal fats (butter and tallow) has remained steady at to the periods in which they first arose, but continue to approximately 12 million metric tons. Principal vegetable characterize certain geographic and socioeconomic (SES) oils include soybean, sunflower, rapeseed, palm, and ground- subpopulations. Elsewhere we have laid out the full set of nut oil. With the exception of groundnut oil, global nutrition transition stages in more detail.6,7 availability of each has approximately tripled between 1961 On a global basis, there are several themes related to and 1990. While the broader macroeconomic shifts that obesity that we will summarize. The first is the general shift affected this increase in edible vegetable fat intakeFnamely, toward obesity that represents a global problem rather than edible vegetable fat prices, supply, and consumptionFis one centered in a few high-income countries. The second is unique because it affected rich and poor countries equally, the rapid increase in obesity found in lower- and middle- the net impact is relatively much greater on low-income income developing countriesFa rate of change that appears countries.10,11 to be greater than that found in higher-income countries. The third is the shift in the burden of obesity toward the poor on a worldwide basis. We present the limited compar- Caloric sweeteners able data on trends in adolescent obesity across the globe, Sugar is the world’s predominant sweetener. It is not with specific attention to the link between obesity and clear exactly when sugar became the world’s principal economic and social development. sweetenerFmost likely in the 17th or 18th centuryFas the New World began producing large quantities of sugar at reduced prices.12,13 We use the term caloric sweetener Dietary changes around the world are rapid! instead of added sugar, as there is such a range of nonsugar The diets of the developing world are shifting rapidly, products used today. High-fructose corn syrup is a particularly with respect to fat, caloric sweeteners, and prime example, as it is the sweetener used in all US soft animal source foods (ASF).1,8 drinks. The name ‘sweeteners’ includes products used for Urbanization, economic growth, technological changes for work, leisure, & food processing, mass media growth Stage 3 Stage 4 Stage 5 Receding Famine Degenerative Disease Behavioral Change • reduced fat, increased • starchy, low variety, • increased fat, sugar, fruit, veg,CHO,fiber low fat,high fiber processed foods • replace sedentarianism • labor-intensive • shift in technology of with purposeful changes work/leisure work and leisure in recreation, other activity MCH deficiencies, obesity emerges, reduced body fatness, weaning disease, bone density problems improved bone health stunting Accelerated life expectancy, Extended health aging, Slow mortality decline shift to increased DR-NCD, reduced DR-NCD increased disability period Figure 1 Stages of the nutrition transition. International Journal of Obesity Worldwide obesity dynamics and their determinants BM Popkin and P Gordon-Larsen S4 sweetening derived either from sugar crops, cereals, fruits, Animal source foods milk, or produced by insects. This category includes a wide The revolution in ASF refers to the increase in demand and variety of monosaccharides (glucose and fructose) and production of meat, fish, and milk in low-income develop- disaccharides (sucrose and saccharose), which exist either ing countries. Delgado at International Food Policy Research in a crystallized state as sugar or in thick liquid form as Institutes (IFPRIs) has studied this issue extensively in a syrups. Included in sweeteners are maple sugar and syrups, number of seminal reports and papers16,17 Most of the caramel, golden syrup, artificial and natural honey, maltose, world’s growth in production and consumption of these glucose, dextrose, glucose (also known as high-fructose corn foods comes from the developing countries; thus, develop- syrup), other types of fructose, sugar confectionery, and ing countries will produce 63% of meat and 50% of milk in lactose. 2020. It is a global food activity, transforming the grain In the last several decades, increasingly larger quantities markets for animal feed. It also leads to resource degradation, of cereals (primarily maize) have been used to produce
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