Consumer understanding of calorie amounts and serving size: implications for nutritional labelling

Area of Science:

• Public Health Nutrition
• Consumer Behavior
• Food Labeling Policy

Background:

• Rising obesity rates are linked to increased sugar-sweetened beverage consumption.
• Canadian food regulations mandate calorie information by serving size, but serving sizes vary.
• Industry voluntary labeling schemes also exist, creating potential confusion.

Purpose of the Study:

• To assess consumer understanding of calorie information on nutrition labels.
• To compare the effectiveness of government-mandated labels versus industry labeling schemes.
• To evaluate comprehension based on whether calories are presented per serving or per container.

Main Methods:

• A national online survey of 687 Canadian adults.
• Participants viewed images of beverage containers with different labeling formats (government vs. industry, per serving vs. per container).
• Participants were asked to determine the total calorie content of the beverage.

Main Results:

• Only 54.2% of participants correctly identified the total calories.
• Government-mandated labels (59.0%) were more effective than industry labels (49.1%).
• Listing calories per container (91.8%) was significantly more effective than per serving (11.8%).

Conclusions:

• Consumers have difficulty interpreting calorie information on beverage labels, particularly with industry schemes and per-serving data.
• Current labeling standards may need revision to improve consumer comprehension.
• Industry labeling initiatives require closer examination for their effectiveness and potential to mislead.