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Better access to healthy foods is not enough to tackle obesity

US neighborhood grocery store initiative fails to alter obesity or fruit and vegetable intake

2014-02-04
(Press-News.org) Contact information: Joel Winston
press@lshtm.ac.uk
44-020-792-92802
London School of Hygiene & Tropical Medicine
Better access to healthy foods is not enough to tackle obesity US neighborhood grocery store initiative fails to alter obesity or fruit and vegetable intake Government initiatives to improve access to healthy foods may have a limited impact on obesity in the US, according to new research by the London School of Hygiene & Tropical Medicine and Penn State University.

Disadvantaged neighbourhoods often lack access to low-cost healthy foods, which has led to recent US policy initiatives that focus on increasing the number of local supermarkets through grants and loans. These programmes include the $400 million Healthy Food Financing Initiative, promoted by the White House Task Force on Childhood Obesity, and New York City's FRESH programme, which continue to be rolled out in urban areas of the US. But to date, there have been no formal evaluations of how effective these programmes actually are at improving diet and reducing obesity.

Now a study being published in the February issue of Health Affairs has provided the first US-based evidence that building new food retail stores is not sufficient to improve the diets of low-income residents.

The researchers investigated the impact of a new supermarket opening in a low-income community in Philadelphia, classified as a "food desert" by the US Department of Agriculture. The supermarket is part of the Pennsylvania Fresh Food Financing Initiative, which has been responsible for 88 new or expanded food retail outlets in the area. After studying around 650 residents over a period of four years, the results showed that although there were improvements in residents' perceptions of food accessibility, these did not translate into significant changes in diet.

Few residents chose to shop at the new supermarket once it opened, with only 27% of residents adopting it as their main food store and just 51% using it for any food shopping at all. Despite the programme's objectives of improving diet, exposure to the new supermarket had no significant impact on reducing obesity or increasing daily fruit and vegetable intake. These findings mirror the results of previous UK-based studies, which also found no significant evidence for any effect on diet. However, the authors note that additional studies are required to confirm these findings in other populations.

Lead author Dr Steven Cummins, Professor of Population Health at the London School of Hygiene & Tropical Medicine, said: "US policymakers have implemented policies and interventions that encourage the location of supermarkets and grocery stores to improve diet and reduce diet-related diseases such as obesity and diabetes. Such policies form a central part of many US government schemes such as Michelle Obama's Lets Move Childhood Obesity programme, and are high on the policy agenda in many other nations. However we don't know whether these kinds of policies are effective in improving diet.

"Though these interventions are plausible and well-meaning, this study suggests that they are only effective in taking us part of the way in changing dietary behaviour – in order to realise their full potential we need to better understand how to translate changes in perception to changes in behaviours."

The researchers suggest that the development of new food retail stores needs to be combined with complementary initiatives that focus on price promotions, marketing and branding to encourage greater use of these new stores.

### The study was funded by the National Institute of Environmental Health Sciences

For more information, to request interviews or to receive a copy of the research paper, please contact the London School of Hygiene & Tropical Medicine press office on +44 (0)207 927 2802 or press@lshtm.ac.uk.

Notes to Editors:

Steven Cummins, Ellen Flint, and Stephen A. Matthews. New Neighborhood Grocery Store Increased Awareness Of Food Access But Did Not Alter Dietary Habits Or Obesity. Health Affairs. DOI: 10.1377/hlthaff.2013.0512

Link to study once published: http://content.healthaffairs.org/content/33/2/283.abstract

About the London School of Hygiene & Tropical Medicine

The London School of Hygiene & Tropical Medicine is a world-leading centre for research and postgraduate education in public and global health, with 3,500 students and more than 1,000 staff working in over 100 countries. The School is one of the highest-rated research institutions in the UK, and was recently cited as one of the world's top universities for collaborative research. The School's mission is to improve health and health equity in the UK and worldwide; working in partnership to achieve excellence in public and global health research, education and translation of knowledge into policy and practice. http://www.lshtm.ac.uk


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[Press-News.org] Better access to healthy foods is not enough to tackle obesity
US neighborhood grocery store initiative fails to alter obesity or fruit and vegetable intake