The Nutri-Score algorithm: Evaluation of its validation process

Area of Science:

• Nutritional Science
• Public Health Policy
• Food Labeling Systems

Background:

• The Nutri-Score front-of-pack label is a candidate for EU-wide standardized nutrition labeling.
• Its algorithm originates from the UK's Food Standard Agency (FSA) nutrient profile model.
• Nutri-Score classifies products into 5 nutritional quality classes (A-E).

Purpose of the Study:

• To review the development and validation of the Nutri-Score algorithm.
• To assess the Nutri-Score label's validity and applicability in the European context.
• To inform discussions on EU nutrition labeling policies.

Main Methods:

• Review of existing studies on Nutri-Score's content, convergent, and predictive validity.
• Evaluation of Nutri-Score's alignment with European dietary guidelines.
• Analysis of Nutri-Score's implementation status in European countries.

Main Results:

• Nutri-Score demonstrates ability to classify foods across the entire food supply.
• Content validity studies show classification by healthfulness but not actual product healthfulness.
• Convergent validity assessment indicates need for algorithm adaptation to align with EU dietary guidelines.
• Predictive validity requires re-assessment post-algorithm adaptation.

Conclusions:

• Nutri-Score is widely studied but its EU-wide validity and applicability remain undetermined.
• Adaptations to the Nutri-Score algorithm are necessary for alignment with diverse European dietary guidelines.
• Further evaluation by an international scientific committee is ongoing for EU implementation.