The emergence of the Internet created a new branch of journalism and forced journalists to adjust the publication of news on Internet portals. With the assumption that journalists use social networks more and more as sources in articles on portals and rarely expand them with information that is not in the social media post, for the purpose of writing this paper, a quantitative research was conducted. In the research, 5 Croatian portals were investigated in a period of 10 days: Index, 24sata, Jutarnji list, Večernji list and net.hr, with the remark that Jutarnji list had to be excluded from the research due to the impossibility of monitoring published articles. The research sought to determine what percentage of articles were sourced from social media, which sections have the most of such articles, and which of the portals leads in the number of articles taken from social media. The analysis includes articles published in the period from April 1 to April 10, 2021, and they were obtained by visiting the mentioned portals every day as well as going through the archive. If all portals are taken into account, the results show that more than 14% of their articles were sourced from social media. Most of such articles were in the Showbiz column, and less than half of them were further expanded.