Study: Consumers Mistakenly Judge Food Naturalness by Shelf Life

A recent study suggests consumers are using a product's shelf life as an unreliable shortcut to determine its naturalness. The common assumption that shorter shelf life equates to less processing is being challenged by new research.

Led by Yann Cornil, an associate professor at the University of British Columbia's Sauder School of Business, the study published in the Journal of Consumer Psychology involved several experiments. Participants were presented with products that were similar except for their shelf lives. Consistently, participants rated foods with shorter shelf lives as more natural.

The experiments utilized various food items, including potato chips with 5-month and 9-month shelf lives, pasta sauces with 1-year and 3-year shelf lives, and granola bars with identical ingredients and nutritional information but differing shelf lives. In one case involving mayonnaise, the extended shelf life was attributed to a better jar seal, not ingredient changes.

The findings highlight a widespread misconception among consumers. While a shorter shelf life can sometimes indicate fewer preservatives, it is not a universal indicator of naturalness. Numerous factors, including packaging and production methods, influence shelf life. The study also noted that products with longer shelf lives were sometimes perceived as better for the environment.

The research underscores the need for greater consumer awareness regarding food processing and the various factors affecting shelf life. Relying solely on shelf life for food choices may not lead to the healthiest or most natural options.