When it comes to making healthier food purchases at the grocery store, the simpler the nutritional packaging is, the better. In fact, if a consumer only has to look at a single number鈥攁 score that represents the nutritional value of what's inside the packaging鈥攖hat consumer is more likely to buy healthier products.
That's the finding of a new study published in the聽Journal of Marketing Research: "Healthy Choice: The Effect of Simplified Point-of-Sale Nutritional Information on Consumer Food Choice Behavior," co-authored by Hristina Nikolova, the Coughlin Assistant Professor of Marketing at 涩里番下载's Carroll School of Management. The study involved more than 535,000 shoppers, eight different food categories, and a major grocery store chain that utilized the NuVal鈥攕hort for Nutritional Value鈥攕implified scoring system.
"The benefit of the NuVal system is that it takes all the nutritional information available on the nutritional label and basically summarizes it into one score that is displayed on the shelf pricing tag," says Nikolova, who conducted the study with co-author J. Jeffrey Inman, associate dean for research and faculty and the Albert Wesley Frey Professor of Marketing at the University of Pittsburgh Joseph M. Katz Graduate School of Business. "The NuVal scores allow shoppers to easily find healthier products. Consumers basically can very easily identify the healthier products," Nikolova said.
The NuVal System was developed by a team of nutrition, public health, and medical experts after the 1990 Nutritional Labeling and Education Act鈥攚hich mandated nutritional labels list ingredients such as fat content, sodium, calories, carbohydrates, et. al.鈥攆ailed to reduce the nation's obesity rate. While well-intentioned, the labels "are somewhat difficult and time consuming to understand," according to the study, because shoppers look at the product packaging and have to "combine all the information into an overall evaluation."Researchers cite a 2012 Nielsen study that found 59% of grocery shoppers experience difficulty in understanding nutritional facts on product packaging.
The NuVal System, currently available in more than 1,600 U.S. stores, scores food products on a scale of 1 to 100鈥攖he higher the score, the better the nutrition.
"Our study indicated that the NuVal nutritional scale had an immediate and powerful impact on shoppers' decisions," says Inman. "They changed their purchasing behavior to pick healthier choices and they switched to higher-scoring products. In fact, the simplified nutritional information boosted healthy choices by over 20 percent."
Researchers worked with the grocery store chain that first began implementing the NuVal scoring system in its stores in 2008. The chain provided dates for when the NuVal scores were introduced for the eight food categories examined鈥攆rozen pizza, tomato products, soup, salad dressing, yogurt, spaghetti sauce, granola bars, and ice cream. The study compared purchases of more than 535,000 frequent shoppers in the six-month pre-rollout period and the six-month post roll-out period.
Researchers say NuVal鈥攐r any kind of POS nutritional scoring system鈥攁lso helps save time.
"Thinking about the limited time that you have to go and do your grocery shopping, you don't have time to pick up every product, look at the label, take another product and compare the labels on all the different ingredients. So NuVal helps with that as well鈥攊t facilitates the shopping," says Nikolova.
Given the ease of use, and America's increased focus on health, the study found consumers using POS nutritional scoring systems tended to gravitate toward products with higher nutritional scores, regardless of the price. In fact, price sensitivity in the grocery chain the study examined decreased by 19 percent, while overall sales increased.
Additionally, researchers found that although consumers were paying less attention to price, they actually paid more attention to a store's promotions.
"Our study also revealed that shoppers became less price-sensitive and more promotion-sensitive following the introduction of the food scoring system," says Inman. "The new nutrition scores help to justify the price. This means that grocery stores were able to create a win-win by helping their customers make healthier choices, while also increasing sales at their store."
"Instead of thinking about reducing prices as a way to increase sales, stores can think about highlighting their promotions in the store," says Nikolova. "After the introduction of a POS simplified nutrition scoring system, shoppers start paying more attention to nutrition and they have less attention to devote to other factors in their shopping decisions, such as price for example. They are then looking for shopping heuristics that would save them mental energy鈥攁nything that makes their decisions easier. Promotions, which are usually prominently highlighted in the store, are one such heuristic. Thus, shoppers become more sensitive to promotions."
Based on their findings, the study's authors say that the rest of the nation's approximately 37,000 supermarkets should consider POS nutritional scoring implementation, and the U.S. government might want to consider a new standardized nutritional scoring system.
For now, the study's message is aimed at creating healthier choices for consumers and a healthier bottom line for retailers.
"It's a big initiative," summarize Inman and Nikolova. "Stores that don't implement a simplified nutrition scoring system risk being at a competitive disadvantage if a nearby competitor implements a simplified nutrition scoring system. Stores that already have NuVal are doing something beneficial for their customers."
聽Sean Hennessey | News & Public Affairs