Disinformation about diet and nutrition on social networks: a review of the literature.

Background: social networks have become indispensable for global communication, offering unparalleled access to information. However, the lack of content regulation has allowed health and nutrition misinformation to thrive, posing significant public health risks. Objectives: this study aimed to identify the social networks most frequently used for spreading nutrition-related misinformation and evaluate the primary topics, including diseases and dietary claims, featured in these messages. Methods: a systematic review of the literature was conducted, analyzing studies focused on nutrition-related misinformation across platforms such as Twitter, Instagram, TikTok, and YouTube. Data collection adhered to PRISMA guidelines, and findings were synthesized narratively to address the study objectives. Results: this study analyzed 28 documents focusing on nutrition-related misinformation on social networks. Instagram (50 %) and YouTube (39.28 %) were identified as the most prevalent platforms for spreading such content, followed by TikTok (5.13 %) and Twitter (10.72 %). Over 62 % of the reviewed studies addressed misinformation linked to miracle diets, often associated with orthorexia (14.28 %) and COVID-19 (14.28 %). These diets frequently included unverified claims of rapid health improvements. Notably, credible nutrition content was predominantly shared by healthcare professionals and academic organizations, highlighting their key role in fight against misinformation. Conclusions: misinformation about nutrition on social networks is a growing public health concern. Public health institutions must implement strategies to improve digital literacy and provide tools for assessing information credibility. Healthcare professionals should leverage social media to disseminate evidence-based knowledge, counteracting the influence of unreliable sources. Collaborative efforts are essential to ensure social networks serve as platforms for reliable health promotion and education.