Research on Healthy Vending Machine Snacks

Introduction to the Study

Recent findings from Yale University researchers indicate that offering healthy snacks in vending machines, accompanied by nutritional information and promotional items, can lead to increased sales. This research highlights the importance of making informed food choices, especially when it comes to vending machine selections.

Study Overview

To explore the impact of stocking vending machines with healthier snack and beverage options, the researchers targeted 56 machines on a university campus. This included 28 snack machines and 28 beverage machines, strategically placed in libraries, classrooms, dormitories, and administrative buildings to capture a diverse audience of students, faculty, and staff.

Research Goals

The researchers aimed to determine whether various promotional strategies and pricing, along with products that meet the National Automatic Merchandising Association’s FitPick nutritional standards, would lead to healthier consumer choices compared to traditional offerings such as candy, cookies, and sugary sodas.

Methodology

The study was conducted over a five-month period, from February to June 2015, with results compared to the same timeframe the previous year. Some snack vending machines featured exclusively FitPick-approved items, including Nature Valley Granola Bars and Baked Lays Potato Chips, while others contained a mix of approximately 70% high-fat and high-sugar snacks alongside 30% healthier options.

Nutritional signage was displayed to inform consumers about the FitPick items and encourage healthier purchases, with some machines offering price reductions on these products. The same approach was taken with beverage vending machines, which included healthier choices like water and unsweetened iced tea alongside sugary sodas.

Data Collection and Analysis

Revenue and sales data from the snack and beverage machines were collected monthly. Researchers analyzed the 2014 and 2015 sales data to evaluate whether the product selection, signage, and pricing influenced consumer choices.

Study Findings

The results, published by the Journal of the Academy of Nutrition and Dietetics in February 2017, revealed that while consumers preferred FitPick snacks over traditional options, overall revenue decreased due to price reductions. In contrast, the beverage selections showed an increase in sales when nutritional guidelines and promotional strategies were applied. Notably, water emerged as the most popular beverage sold from the machines in 2015.

Influence of Promotional Signage

The study indicated that a combination of promotional signage and nutritional guidelines significantly influenced consumer behavior toward healthier snacks. The researchers introduced the term “health priming” to describe how exposure to certain cues can affect purchasing decisions.

Strengths and Limitations of the Study

The study’s strengths include a large sample size of vending machines, diverse variable combinations, an extensive duration, and thorough data analysis. However, the researchers acknowledged a potential weakness, noting that the novelty of the healthier options may have impacted consumer choices. Additionally, while the FitPick products were healthier than traditional snacks, they still may not represent the healthiest options available.

Conclusion

Overall, this research suggests that offering healthier vending machine snacks can contribute to better nutritional choices for consumers. The findings emphasize the potential for improved public health through accessible and appealing food options.

Author Information

Written by Susan Mercer Hinrichs, MA, MBA, CPhT.
Reference: Health Promotion and Healthier Products Increase Vending Purchases: A Randomized Factorial Trial
Authors: Sophia V. Hua, MPH; Lisa Kimmel, MS, RD; Michael Van Emmenes; Rafi Taherian; Geraldine Remer; Adam Millman; and Jeannette R. Ickovics, PhD.