• Beatriz Franco-Arellano, Lana Vanderlee, Mavra Ahmed, Angela Oh, and Mary L'Abbé.
• Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Medical Sciences Building, 1 King's College Circle Rm 5368, Toronto, Ontario, M5S 1A8, Canada. Electronic address: beatriz.francoarellano@mail.utoronto.ca.
• Appetite. 2020 Jun 1; 149: 104629.

AbstractMandatory front-of-pack (FOP) labelling was proposed in Canada to highlight foods with high contents of sugars, sodium and/or saturated fats, which would be displayed on labels along with the mandatory Nutrition Facts table and voluntary nutrition claims. In an online survey, participants (n = 1997) were randomized to one of four FOP labelling conditions: 1) control, 2) warning label, 3) health star rating or 4) traffic light labelling. Participants were shown four drinks (a healthier drink with or without a disease risk reduction claim, a healthier drink with or without a nutrient content claim, a less healthy drink with or without a disease risk reduction claim and a less healthy drink with or without a nutrient content claim) in random order and one at a time. Participants rated perceived product healthfulness and purchase intentions using a 7-point Likert scale. Participants could access the Nutrition Facts table while viewing labels. Results showed less healthy drinks displaying any FOP labelling were perceived as less healthy compared to the control. In healthier drinks, health star rating and traffic light labelling created a 'halo' effect, which was not observed with warning labels. Similar results were observed with purchase intentions. Drinks displaying a disease risk reduction claim were perceived as healthier than those without (p < 0.001) regardless of product's healthfulness. The effect of a nutrient content claim was not significantly different. The effect of FOP labelling and claims was mitigated for those who used the Nutrition Facts table. FOP labelling was likely helpful for consumers with different levels of health literacy. Overall, FOP labelling had significantly stronger influence than nutrition claims on consumers' perceptions; however, the effect of each FOP label varied on healthier and less healthy drinks.Copyright © 2020 The Authors. Published by Elsevier Ltd.. All rights reserved.

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