This report critically appraises a research paper by Day et al. (2018) investigating illicit drug use, knowledge, and practices among music festival attendees, focusing on drug content and purity. The appraisal examines the authorship, research questions, design, methods, and limitations of the study. The paper employed a cross-sectional survey to gather data on drug use patterns and attitudes toward drug checking services. The study found that a significant portion of attendees reported illicit drug use and had positive perceptions of drug checking. The report also discusses the application of the research findings to a case scenario involving a mother's concerns about drug testing at festivals, identifying enablers and barriers to the practical use of the evidence. Key limitations include convenience sampling and the potential for gender bias. The report concludes by emphasizing the importance of considering biases to enhance the validity and applicability of research findings in the context of public health and harm reduction strategies.