Social networking sites enable collective knowledge creation as well as sharing it with other users. Due to its reach and a specific function, networking sites such as Facebook and YouTube are used not only as a source of entertainment but also as a mine of information on
products for consumers. The aim of this paper is to determine whether it is possible to exploit social networking sites as a platform for sharing knowledge on healthy eating. This article features results obtained from authors’ own research conducted in 2019 utilizing data exploration and content analysis. The research material consisted of data collected from two popular social networking websites: Facebook and YouTube.