Dietary behaviors are significantly shaped by the environment of grocery stores (Mhurchu et al., 2013). Factors such as price promotions, product variety, and category displays within stores influence food purchases (Hui et al., 2013; Inman et al., 2009), and consumers' food choices in grocery stores are closely aligned with their overall diet and consumption patterns (WHO, 2021; Yoo et al., 2006). Since grocery stores remain the primary channel for food sales (Block & Morwitz, 1999; USDA ERC, 2018), the high availability of highly processed, fatty, and sugary foods in these environments is concerning. This issue is particularly pressing given that 39% of the global adult population is overweight (BMI ≥ 25), and about 13% is obese (BMI ≥ 30), according to recent WHO data (2020). However, grocery store environments also have potential as tools for promoting better public health nutrition (Mizdrak et al., 2017). The WHO (2016) has advocated for creating supportive store environments to encourage healthier consumer choices.

This research project focuses on identifying effective in-store or on-pack interventions and evaluating their impact on healthier purchasing behaviors with a specific focus on shelf placement interventions and on-pack health claim effects.