Health-Related Communication of Social Media Influencers: A Scoping Review.

Social media influencers (SMIs) are an essential part of today's digital media landscape and have the ability to significantly impact the health-related attitudes and behavior of their audiences. Despite an increasing number of studies, research has produced mixed results, and a comprehensive overview of the main findings is lacking. Therefore, the goal of this scoping review was to comprehensively map the literature focusing on SMIs and their health-related communication. Specifically, we analyzed the most frequently studied health topics and social media platforms, the methodological characteristics of the studies, as well as the communication techniques employed by SMIs, and the potential positive and negative effects of their communication on their audience. Additionally, we examined the major research gaps in this area. Altogether, we analyzed n = 116 empirical papers. The results reveal a wide range of different outcomes influenced by SMIs, including both positive and negative changes in health-related attitudes and behavioral intentions among their followers. Furthermore, our findings highlight the need for future research to prioritize experimental and longitudinal studies, investigate actual behavioral outcomes resulting from influencer content exposure, and closely examine the potential negative effects of SMIs' health-related communication. More attention needs to be paid to health-related misinformation disseminated by SMIs. Lastly, this study identified several highly relevant health topics and social media platforms that should be the focus of future research.