Étiquetage
Le Nutri-Score change-t-il vraiment les achats ?
En quelque sorte. L'effet plus important pourrait être sur les fabricants qui reformulent pour obtenir de meilleurs scores, ce qui n'est généralement pas le sujet du débat.
Ce que les revues trouvent
Une revue systématique de 2025 sur l'efficacité du Nutri-Score [1] et une revue de l'impact de l'étiquetage en façade [4] convergent: les étiquettes modifient les achats dans la direction souhaitée, et le changement est faible. Les travaux de validation par critères [2] abordent une question différente et antérieure — si l'algorithme classe les aliments comme le ferait la science nutritionnelle — et la réponse est globalement oui, avec des cas limites connus.
Les indices diététiques sous-jacents à ces systèmes ont également été examinés [3], ce qui est important car un algorithme de profilage encode des jugements contestables sur les nutriments à pondérer.
Effets de l'étiquetage en façade
Les cas limites connus
Les critiques pointent du doigt l'huile d'olive, les noix et le fromage qui obtiennent un score moins bon que ce que l'intuition suggère, et certaines boissons diététiques qui obtiennent de bons scores. Une partie de cela est juste et une partie ne comprend pas la conception : le Nutri-Score compare au sein des catégories sur une base de 100 g et n'est pas un verdict sur la question de savoir si un aliment appartient à un régime alimentaire sain.
Les révisions récentes des algorithmes ont traité plusieurs de ces cas. Le point plus profond demeure : une seule lettre ne peut pas encoder tout ce qui concerne un aliment, et le traiter comme si c'était le cas est un abus plutôt qu'un défaut.
Ce que signifie légalement une allégation de santé
Dans l'UE, les allégations nutritionnelles et de santé sont réglementées : seules les allégations autorisées avec une base de preuves acceptée peuvent apparaître, et chacune est liée à des conditions d'utilisation spécifiques. "Contribue à un fonctionnement normal du système immunitaire" est une phrase autorisée avec une base définie, pas une prose marketing.
Ce qui n'est pas réglementé, c'est tout ce qui l'entoure — imagerie, langage de provenance, et termes comme "naturel" ou "sain". La déclaration réglementée est souvent l'affirmation la moins trompeuse sur l'emballage.
Questions fréquentes
Le Nutri-Score est-il précis ?
Pourquoi l'huile d'olive obtient-elle un mauvais score ?
Les étiquettes changent-elles les comportements ?
Le Nutri-Score devrait-il être obligatoire dans l'UE ?
Related reading
- Les gens savent-ils vraiment lire une étiquette nutritionnelle ?
- Ce que signifie réellement une allégation de santé sur une étiquette alimentaire
References
Every citation below links to the original peer-reviewed record on PubMed or via DOI. Nothing here is a substitute for medical advice.
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