As of May last year, all American restaurant chains with 20 or more outlets have been legally obliged to provide calorie counts on their menus in a bid to help people make less fattening choices. So how’s that going then?
Not so well if the latest study – the largest to date on how calorie information affects consumer purchases – is anything to go by.
The setting for the study, published in the British Medical Journal was a large franchise of a national fast-food company with three different restaurant chains located in Louisiana, Texas, and Mississippi ….
104 outlets were involved in the analysis, all of which added calorie information to their in-store and drive-thru menus in April 2017. Weekly aggregated sales data was made available to the researchers from the pre-labeling (April 2015 to April 2017) period to up until April 2018 – a year after labeling implementation.
The investigators found that calorie labeling produced an immediate decrease of 60 calories per transaction or 4% of total calories purchased (which was not due to menu reformulation). But over the following year, that 60 calorie reduction had attenuated to just 23 fewer calories for each purchase made, or just 10 fewer calories if only one rather than two years of pre-implementation data was used in crunching the stats.
Read full, original article: Calorie Counts on Menus Have Virtually No Impact On What We Eat