Body Mass Index, Well-being, and Social Relationships: A Meta-Analysis of Cultural, Gender, and Methodological Dimensions
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This review synthesizes evidence from 33 studies to show the relationships between body mass index (BMI), subjective well-being, and social dynamics, with attention to cultural, gender, and methodological moderators. Across diverse contexts, obesity is consistently associated with lower subjective well-being, an effect mediated by physical-health comorbidities, weight stigma, and body dissatisfaction. Cultural framing moderates the association: Collectivist and individualist societies vary in the strength and nature of the relationship between BMI and happiness, with some populations showing an inverted U-shaped trend where well-being reaches its highest point at moderate BMI levels. Additionally, gender plays a significant role in this relationship, as the societal preferences for thinness place a heavier burden on women. Obesity is also linked to elevated anxiety and depression, with effects most pronounced among adolescents and marginalized groups, where stigma and negative body image are most acute. Interpersonal relationships, including familial and romantic ties, are frequently strained by weight-related stigma, although same-sex partnerships and collectivist family structures may buffer these effects. Socioeconomic disadvantage compounds the inequalities by restricting access to health-promoting resources. Methodologically, the reviewed literature is constrained by a predominance of cross-sectional designs and the underrepresentation of non-Western populations, underscoring the need for longitudinal and qualitative inquiry. The findings indicate that effective intervention requires weight-inclusive, culturally tailored approaches that tackle systemic stigma and the wider social factors influencing health. Policymakers should prioritize anti-stigma legislation, inclusive health initiatives, and supportive social frameworks to advance equity and well-being on a global scale.
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