Changes in front-of-pack food information but limited product formulation following a Nutri-Score algorithm update: a longitudinal case study in breakfast cereals

This longitudinal case study examines the combined use of Nutri-Score and nutrition claims on breakfast cereals in Dutch supermarkets before (2022, n = 257) and after (2024, n = 236) the Nutri-Score algorithm update. Nutri-Scores shifted towards less favourable classifications in 2024, with increased proportions mainly for D and E scored products. Concurrently, the prevalence of nutrition claims rose from 64.6% to 89.0%, including an increase in products with low Nutri-Scores displaying claims (2% in 2022 to 10.6% in 2024). No significant improvements were observed in energy, sugar, saturated fat, salt, fibre, or protein content over time. These findings reveal that consumers are exposed to potentially conflicting front-of-pack food information, highlighting the need for better alignment of food information policies to support informed and healthier food choices.