Vegetarianism is on the rise worldwide and its importance is being emphasized in various ways, such as in its sustainability, environmental, food system, and ethical aspects. The purpose of the study is to identify motivations behind food choices and dietarian identity, to investigate the perceptions about plant-based foods, and to identify differences between vegetarians and omnivores. We conducted an online survey of 245 vegetarians and 246 omnivores. There was a significant difference between vegetarians and omnivores. In food choice motivations, vegetarians scored higher in the factors of ‘ethical concern’, ‘health’, and ‘convenience and price’, while omnivores responded higher in ‘sensory appeal’ and ‘weight control’ factors. In the dietarian identity, vegetarians scored higher in the ‘complex motivation’ and ‘strictness’ factors, while on the other hand omnivores scored higher in ‘out-group regard’ and ‘public regard’ factors. Although the reasons can be different, we confirmed that both vegetarians and omnivores are positive toward plant-based foods. Our results suggest that different strategies will be needed to promote plant-based food consumption to vegetarians and to omnivores.

Purpose: Vegetarian diets are increasingly common worldwide. Vegetarianism is no longer just related to food, but rather it evokes a deeper meaning, such as environmental sustainability and animal welfare. In Western cultures, many studies have examined how vegetarians' motivations relate to animal welfare, health and environmentalism. However, there is little research in this area in Asia, especially in South Korea, despite a growing number of vegetarians. This study identifies the hierarchical value maps (HVMs) of vegetarians to clarify why people choose to become vegetarians and investigates the negative aspects of these dietary types.Design/methodology/approach: The authors conducted in-depth, one-to-one laddering interviews with 33 vegetarians in South Korea based on the means-end chain theory. The laddering technique is a qualitative approach to determining connections between attributes, consequences and values.Findings: Vegetarians tend to value an ethical lifestyle, sustainable future, ecological circulation, responsibility for nature, respect for life, respect for the weak and quality of life. HVM differs slightly among groups by the type of vegetarianism (vegan vs non-vegan vegetarians) and sex (females vs males). The most dominant cognitive structures toward vegetarian diets were “meat-free,” “no factory farming,” and “plant-based” (attributes); “health,” “environment-friendly” and “animal-friendly” (consequences); and “quality of life,” “ethical life,” and “sustainable future” (values).Originality/value: This study offers insights into the motivations of Korean vegetarians, and they are not culturally different from those of Westerners as they relate to animals, the environment and health.