This study examines 102 news items related to collagen as a dietary supplement, written in Spanish and published over a period of 2 years, in both digital and print media. The objective of this study is to evaluate the scientific rigor and consistency of the news information included in the sample. Errors and incorrect uses relative to the current scientific knowledge were identified in the analyzed information, and these errors were classified according to the criteria extracted from previous research. The evidence gathered shows a relevant frequency of errors in the information examined. The results are discussed in light of the role that the media plays in the transmission of beliefs regarding the value of collagen supplements.