To explore whether PACE levels can make a difference in real world settings, researchers from the University of Cambridge’s Behaviour and Health Research Unit carried out an experiment across 10 workplace cafeterias in England over a 12 week period in 2021. Their results are published today in PLOS Medicine.
The team collected baseline sales data for a period of business-as-usual for the cafeterias ahead of the experiment. During this period, most labels and menus featured only the product name and price, though some products included standardised front-of-pack nutrition labels on branded and in-house products. During the intervention period the ten cafeterias included calorie information and PACE labels alongside food and drinks items and on items including hot meals, sandwiches, cold drinks and desserts. These labels displayed the minutes of walking that would be needed to burn off the calories in the product.
The team found no evidence that including PACE labels resulted in an overall change in energy purchased from labelled items. However, there was a great deal of variability, with one cafeteria reporting a fall per transaction of 161kcal and another an increase of 69kcal, while five of the cafeterias reported no significant change.
First author Dr James Reynolds from the School of Psychology, Aston University, who carried out the research while at Cambridge, said: “Although we found that showing the amount of exercise required to burn off calories made little difference to the number of calories purchased – and, we can assume, eaten and drunk – there was considerable variability between cafeterias. This suggests that other factors may have influenced the effectiveness of these labels, such as the type of food sold in the cafeteria or the characteristics of those using them.”
The number of calories purchased from items that did not feature the PACE labels did not change and the labels made little difference to the revenue for the cafeterias – just a small increase of 3p per transaction.
Senior author Professor Dame Theresa Marteau, Director of the Behaviour and Health Research Unit at the University of Cambridge, said: “This is the largest study in a real world setting to look at the impact of PACE labels on food and drink purchases, examining 250,000 transactions across 10 worksite cafeterias. The findings suggest that PACE labels, contrary to expectations, may have little or no impact on the food people buy in worksite cafeterias.”