Estimated effects of the implementation of the Mexican Warning Labels regulation on the use of health and nutrition claims on packaged foods
Abstract Background The use of health and nutrition claims on front-of-pack labels has a potential effect on consumers' food choices; therefore, many countries established regulations to avoid misperceptions. This study describes the use of nutrition and health claims on the front-of-pack of food products in retail stores in Mexico and analyze the potential effects of the new front-of-pack labelling regulation on the use of these claims. Methods This is a cross-sectional study in which nutrition and health claims, nutrition information panels, and the list of ingredients of all foods and beverages available in the main retail stores in Mexico City were collected. The products were grouped by level of processing according to the NOVA food system classification. Claims were classified into different types using the internationally harmonized INFORMAS taxonomy. The potential effect of the implementation of the warning label regulations on the use of nutrition and health claims was estimated by food group and by thresholds of energy and critical nutrients according to the new regulation. Results Of 17,264 products, 33.8% displayed nutrition claims and 3.4% health claims. In total 80.8% of all products on the Mexican market were classified as "less healthy"; 48.2% of products had excess calories, 44.6% had excess sodium, and 40.7% excess free sugars according to the new regulation. The new regulation would prevent 39.4% of products with claims from displaying health and nutrition claims (p<0.001); the largest reduction is observed for ultra-processed foods (51.1%, p<0.001). The regulation thresholds that contribute the most of the reduction in the use of claims were calories (OR 0.62, p<0.001) and non-sugar sweeteners (OR 0.54, p<0.001). Conclusions The new Mexican front-of-pack labelling regulation will prevent most of less healthy processed and ultra-processed foods from displaying HNC and will potentially increase the effectiveness of the warning labels for consumers.