TikTok and Instagram wellness posts reflect orthorexia-related attitudes, content analysis finds

A content analysis of 300 popular TikTok and Instagram posts found that wellness content frequently combined restrictive food rules, moral judgments about food, appearance-focused definitions of health and unrealistic dietary ideals, with messages that resemble attitudes associated with orthorexia nervosa. Researchers at Flinders University published the analysis in the Journal of Technology in Behavioral Science on 22 July 2026. The study examined what creators posted rather than whether exposure to social media causes obsessive eating behaviour or eating disorders, so its findings describe patterns in the sampled content and cannot establish a causal effect on viewers.

The researchers selected popular posts tagged #healthylifestyle, #nutrition and #cleaneating. They reported that 67% of the analysed posts emphasized clean or healthy eating, almost one-third promoted food restrictions or rules, and one in five framed foods as “good” or “bad.” Nearly two-thirds featured body objectification, while many linked health directly to achieving a lean, toned appearance. Three-quarters also promoted supplements or superfoods, often presenting them as essential to health despite limited scientific context.

Overall, the posts frequently communicated rigid standards about what people should eat and how their bodies should look, even when framed as encouragement toward healthier habits. The study also evaluated the credentials of the people producing the content. Unqualified influencers accounted for 78% of the creators analysed, and more than two-thirds of the health information was classified as misleading or deceptive.

Qualified health professionals were significantly more likely to provide accurate, evidence-based advice. Because the sample covered 300 popular posts on two platforms and three hashtags, the results should not be generalized automatically to all wellness content, other platforms or social media users in general. Lead author Katie Porteous, a Flinders University psychology doctoral student, said many of the analysed posts promoted strict food rules, clean-eating ideals and the belief that health could be achieved through perfect dietary choices.

Those messages closely resemble attitudes associated with orthorexia nervosa, which the release describes as going beyond an interest in healthy eating to a fixation on eating the “right” foods and avoiding those perceived as unhealthy. International body image expert Ivanka Prichard said such messages are often packaged as self-improvement advice while encouraging increasingly rigid and perfectionistic standards around eating. The researchers also noted that health is influenced by genetics, lifestyle, culture and personal circumstances, meaning there is no single diet that works for everyone.

By studying published posts rather than audiences, the research provides evidence of potentially concerning messaging without demonstrating that social media exposure leads to orthorexia nervosa, body-image distress or other clinical outcomes.

Subject of Research: Content analysis of clean-eating and wellness messages shared on TikTok and Instagram

Article Title: Eat like me to look like me

Article References: Eat like me to look like me. Original publication (Bibliographic details unavailable.)

Image Credits: AI Generated

DOI: Not provided

Keywords: social media, orthorexia nervosa, clean eating, TikTok, Instagram, content analysis, diet culture, body image, influencer content, health misinformation, like, look