Traffic Light System Can Increase Healthfulness Perception: Implications for Policy Making

Area of Science:

• Consumer behavior research
• Nutritional science
• Public health interventions

Background:

• Front-of-pack (FOP) nutrition labeling systems aim to inform consumers about product healthfulness.
• The traffic light labeling system uses color-coding to indicate nutrient content.
• Concerns exist regarding how specific information within labels influences consumer perception.

Purpose of the Study:

• To assess the impact of low nutrient content information in traffic light labels on perceived product healthfulness.
• To compare the effectiveness of traffic light labels versus warning labels in shaping health perceptions.
• To evaluate how consumers perceive the healthfulness of products with high content of one key nutrient.

Main Methods:

• Online studies conducted with 1,228 Uruguayan Facebook users.
• Evaluation of front-of-pack (FOP) nutrition labels, including traffic light systems and warnings.
• Analysis of perceived healthfulness using Analysis of Variance (ANOVA).

Main Results:

• Including information on low nutrient content in traffic light labels significantly increased the perceived healthfulness of products high in a key nutrient.
• Nutritional warning labels demonstrated healthfulness ratings comparable to a simplified traffic light system.
• Perception of healthfulness was the primary outcome measure assessed.

Conclusions:

• Traffic light labels highlighting low nutrient content may inadvertently increase perceived healthfulness, potentially reducing their efficacy.
• Nutritional warnings or simplified traffic light systems that focus on high-nutrient content may be more effective.
• Labeling strategies need careful design to avoid misleading consumers about product healthfulness.