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Discounts on purchases of healthy foods can improve diets, study finds
Date:3/18/2013

Lowering the costs of healthy foods in supermarkets increases the amount of fruits, vegetables and whole grain foods that people eat, while also appearing to reduce consumption of nutritionally less-desirable foods, according to research from the RAND Corporation.

Researchers examined a program available to members of South Africa's largest private health insurance company that provides a rebate of 10 percent or 25 percent on purchases of healthy foods. The program, started in 2009, now has about 800 participating supermarkets and enrolls more than 260,000 households.

Interest has been growing in the United States and elsewhere about the ability of food discount programs to help improve diets. The U.S. Congress in 2008 approved funding for a demonstration of the concept, and both employers and insurance companies in the United States are beginning to test the approach.

In the South African program, shoppers can get the rebate on a list of foods selected by a panel of nutritionists, physicians and behavioral scientists. That list has over 6,000 items that account for 20 percent of food spending at supermarkets. Eligible items are marked at supermarket shelves and include fruits and vegetables, whole grains, nonfat dairy, but excludes most items with added sugars or salt.

The research team collected supermarket scanner data linked to 170,000 households and survey data about diet patterns from 350,000 individuals, including both those who participated in the rebate program and those who did not. Regardless of how the information was analyzed, lower prices for healthy foods were significantly associated with better self-reported diet.

"These findings offer good evidence that lowering the cost of nutritionally preferable foods can motivate people to significantly improve their diet," said Roland Sturm, a study co-author and a senior economist at RAND, a nonprofit research organization. "But behavior changes are propor
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Contact: Warren Robak
robak@rand.org
310-451-6913
RAND Corporation
Source:Eurekalert

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