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Calorie Information on Menus can Help Reduce Obesity

by Hannah Joy on February 28, 2018 at 10:02 AM
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Calorie Information on Menus can Help Reduce Obesity

Nutritional labeling on menus and next to food in restaurants or coffee shops and cafeterias can help reduce calorie intake.

Eating too many calories contributes to people becoming overweight and increases the risks of heart disease, diabetes and many cancers, which are among the leading causes of poor health and premature death.

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Several studies have looked at whether putting nutritional labels on food and non-alcoholic drinks might have an impact on their purchasing or consumption, but their findings have been mixed. The new evidence was published in the Cochrane Library.

Now, a team of Cochrane researchers has brought together the results of studies evaluating the effects of nutritional labels on purchasing and consumption in a systematic review.
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The team reviewed the evidence to establish whether and by how much nutritional labels on food or non-alcoholic drinks affect the amount of food or drink people choose, buy, eat or drink. They considered studies in which the labels had to include information on the nutritional or calorie content of the food or drink. They excluded those including only logos (e.g. ticks or stars), or interpretative colors (e.g. 'traffic light' labeling) to indicate healthier and unhealthier foods.

In total, the researchers included evidence from 28 studies, of which 11 assessed the impact of nutritional labeling on purchasing and 17 assessed the impact of labeling on consumption.

The team combined results from three studies where calorie labels were added to menus or put next to food in restaurants, coffee shops and cafeterias.

For a typical lunch with an intake of 600 calories, such as a slice of pizza and a soft drink, labeling may reduce the energy content of food purchased by about 8% (48 calories).

The authors judged the studies to have potential flaws that could have biased the results.

Combining results from eight studies carried out in artificial or laboratory settings could not show with certainty whether adding labels would have an impact on calories consumed. However, when the studies with potential flaws in their methods were removed, the three remaining studies showed that such labels could reduce calories consumed by about 12% per meal.

The team noted that there was still some uncertainty around this effect and that further well conducted studies are needed to establish the size of the effect with more precision.

The Review's lead author, Professor Theresa Marteau, Director of the Behavior and Health Research Unit at the University of Cambridge, UK, says:

"This evidence suggests that using nutritional labeling could help reduce calorie intake and make a useful impact as part of a wider set of measures aimed at tackling obesity," She added, "There is no 'magic bullet' to solve the obesity problem, so while calorie labeling may help, other measures to reduce calorie intake are also needed."

Author, Professor Susan Jebb from the University of Oxford commented: "Some outlets are already providing calorie information to help customers make informed choices about what to purchase. This review should provide policymakers with the confidence to introduce measures to encourage or even require calorie labeling on menus and next to food and non-alcoholic drinks in coffee shops, cafeterias and restaurants."

The researchers were unable to reach firm conclusions about the effect of labeling on calories purchased from grocery stores or vending machines because of the limited evidence available. They also added that future research would also benefit from a more diverse consideration of the possible wider impacts of nutritional labeling including impacts on those producing and selling food, as well as consumers.

Professor Ian Caterson, President of the World Obesity Federation, commented: "Energy labeling has been shown to be effective: people see it and read it and there is a resulting decrease in calories purchased. This is very useful to know combined with a suite of other interventions, such changes will help slow and eventually turnaround the continuing rise in body weight."



Source: Eurekalert
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