(CNN) Food labels detailing how much exercise is needed to burn off a product's calorie content could help to combat obesity, according to UK researchers.

Physical activity calorie equivalent (PACE) labels could improve on labels that identify only calories and nutrient content, according to a new scientific review

Under the proposed system, a small bar of chocolate would carry a label informing consumers that it would take 23 minutes of running or 46 minutes of walking to burn off the 230 calories it contains.

The large-scale application of PACE labels could, on average, cut calorie consumption by up to 200 calories per person per day, according to researchers, whose work is published in the Journal of Epidemiology and Community Health.

But concerns have been raised about the potential impact such labeling might have on people with eating disorders.

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