People who made New Year鈥檚 resolutions to eat healthier or lose weight might also want to brush up on their math skills.
In a new study, marketing professor Donald Lichtenstein found that nutrition labels on packaged food products in the United States can lead even the most health-conscious consumers astray, if they don鈥檛 鈥渄o the math.鈥�
While the 鈥淣utrition Facts鈥� printed on food labels are regulated by the Food and Drug Administration, companies are given some freedom to present food packages as a single serving or as smaller serving sizes within a package, according to Lichtenstein, chair of the CU-Boulder Leeds School of Business marketing department. Through this practice, referred to in the study by Lichtenstein and his colleagues as 鈥渉ealth framing,鈥� companies can present smaller serving sizes so that a food鈥檚 negative nutrients -- calories and fat -- on a nutrition label show up as a lower number per serving.
鈥淭he take-away message is when you look at the calories per serving on a candy bar or a can of soup at the grocery store, be sure to look at the serving size too,鈥� Lichtenstein said. 鈥淪urprisingly, what we found was those people who are health conscious and are concerned about nutrition fall prey to health framing effects more frequently.
鈥淭he problem comes when people do pay attention, but they only pay attention to the calorie information and not the serving size,鈥� Lichtenstein said. 鈥淎nd that鈥檚 what we find in study after study. Those consumers who are more health conscious pay attention to the calorie information, but they don鈥檛 take the extra step to look at the serving size. So they are duped, if you will, by a health framing effect.鈥�
This is where the math part comes in. For example, if a candy bar is 2 ounces and has 200 calories for a whole bar, it might be labeled as one serving or two servings. If the manufacturer decides to make the serving size of 1 ounce it cuts the calories per serving in half.
鈥淲e found that many consumers only pay attention to the calorie information and don鈥檛 look to see exactly what the serving size is,鈥� he said. 鈥淲hen you present a smaller serving size, it cuts down the calories per serving, which makes consumers feel less guilty about consuming the product, and that affects not only their purchase intentions, but actual choice."
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