As part of its cosmetovigilance mission , since the beginning of the year ANSES has received four reports of acute kidney failure following the application of so-called ‘Brazilian hair straightening’ treatments containing glyoxylic acid. As a precautionary measure, ANSES, the Directorate General for Competition, Consumer Affairs and Fraud Control (DGCCRF) and the Directorate General for Health (DGS) are today informing hair salon and cosmetics trade professionals, in addition to users, of this possibility of acute kidney failure associated with the application of hair straightening treatments containing glyoxylic acid. Pending the conclusions of the expert appraisal undertaken by ANSES, both the DGCCRF and the DGS advise against using such straightening products.