This study investigated the effects of social media influencer imitation on body esteem and eating attitudes among women in their 20s and 30s. The aim was to inform healthy weight management and nutrition education in SNS environments. An online survey of 200 women aged 20–39 was conducted from January 16-20, 2026. Data were analyzed using SPSS 28.0 and AMOS, employing factor analysis, reliability testing, and structural equation modeling.Results showed that appearance-related imitation was the most prevalent, accompanied by negative body perception and a prominent fear of weight gain. Imitation behaviors did not significantly impact body esteem. However, cognitive imitation increased body distortion, dieting, and inappropriate eating, while behavioral imitation specifically affected body distortion. Conversely, higher body esteem reduced all eating-related risk factors. The findings suggest that cognitive imitation may elevate risk, whereas body esteem serves as a protective factor. This highlights the importance of educational interventions promoting critical SNS use and positive body image.