How the Nutri-Score System Works
Developed by independent scientists in France and adopted by several European countries, the Nutri-Score system provides an at-a-glance summary of a food product's nutritional quality. It uses a five-level, color-coded scale with corresponding letters, from dark green 'A' to dark orange 'E'. The score is calculated based on the nutritional values of the product per 100 grams or 100 milliliters, allowing for easy comparison between items in the same product category. The greener the score (A or B), the better the nutritional balance, while an orange or red score (D or E) indicates a less favorable composition.
The Nutri-Score Calculation: A Points System
The Nutri-Score is based on an algorithm that weighs "favourable" nutritional components against "unfavourable" ones. A final score is achieved by subtracting positive points (favourable) from negative points (unfavourable), with a lower result indicating a better nutritional rating.
Favourable Nutrients (Positive Points)
Positive points are gained from:
- Fibre
- Proteins
- Fruits, vegetables, pulses, and nuts
- Certain oils (rapeseed, walnut, olive)
Unfavourable Nutrients (Negative Points)
Negative points are accumulated from:
- Energy (Calories)
- Saturated Fatty Acids
- Sugars
- Salt (Sodium)
- Sweeteners (for beverages)
What are the benefits of Nutri-Score?
- Simplifies Information: It provides a simple visual guide from complex nutritional data.
- Facilitates Comparison: Allows quick comparison of similar items.
- Promotes Healthier Choices: Helps identify healthier options more effectively.
- Incentivizes Manufacturers: Encourages reformulation for better scores.
Limitations and Criticisms of the Nutri-Score
Nutri-Score has limitations:
- Comparison Inconsistency: Not designed for comparing products from different categories (e.g., olive oil vs. soda).
- Ignores Processing Level: Does not currently account for the degree of food processing or additives.
- Based on 100g/ml: The calculation uses a fixed amount, not serving sizes.
- Potential for Manipulation: Manufacturers may manipulate formulas for better scores.
- Misrepresentation of Traditional Foods: Can penalize traditional foods naturally high in certain components.
Comparison with Other Food Labeling Systems
Here's a comparison of Nutri-Score with other FOP labels:
| Feature | Nutri-Score (France, Germany, etc.) | Multiple Traffic Light (UK) | Health Star Rating (Australia, NZ) |
|---|---|---|---|
| Rating System | Combined color and letter grade (A-E) for overall nutritional quality. | Individual color coding (red, amber, green) for specific nutrients (fat, sugar, salt). | Numeric star rating (0.5 to 5 stars) based on overall nutritional profile. |
| Basis for Calculation | Balance of favorable (protein, fiber, F&V) and unfavorable (calories, sugar, fat, salt) components per 100g/ml. | Based on levels of specific nutrients per 100g or serving size, depending on manufacturer. | Scores beneficial (protein, fiber, F&V) and risk nutrients (saturated fat, sugar, salt) per 100g. |
| Clarity | Highly intuitive due to the single, comprehensive indicator. | Offers detail on specific nutrients but can be harder to interpret overall. | Clear, but the half-star increments can be less intuitive than A-E. |
| Comparison Scope | Designed for comparing products within the same category. | Can provide quick nutrient info, but comparison across categories is difficult. | Allows comparison of products within and across food categories. |
| Key Benefit | Simplifies complex information into a single, easy-to-understand score. | Highlights specific nutrients to watch out for. | Aims for a broader, more holistic view of product healthiness. |
How to use the Nutri-Score effectively
To use Nutri-Score effectively:
- Compare only within categories (e.g., cereals with cereals).
- Use it as a guide; foods with lower scores can still be part of a balanced diet in moderation.
- Supplement with full nutritional information and ingredient lists for a complete view.
Conclusion: A Tool for Informed Choices
Ultimately, what does the Nutri-Score tell you is a product's nutritional standing relative to comparable items. It is a valuable public health tool that simplifies information for consumers. Despite its limitations in cross-category comparison and processing level consideration, its benefits in guiding healthier purchasing decisions and encouraging manufacturer reformulation are significant. Understanding both its strengths and weaknesses empowers consumers to make informed choices that support overall health, ideally used alongside other nutritional information.