The Custodian of the Two Holy Mosques Institute for Hajj and Umrah Research announces that a study submitted to prove the effectiveness of a mixture of black seed and honey as a protection from pilgrims' exposure to sore throat was not completed by the researcher; the final report for it was not submitted and the study results were not scientifically peer-reviewed by the institute. For this reason, the institute wished to clarify the status of the research.