Mário Barroso is a specialist in forensic medicine who works at the National Institute of Legal Medicine and Forensic Sciences (Portugal). He completed his PhD studies in Toxicology at the University of Beira Interior in 2010. His main research interests include the determination of drugs and drugs of abuse, sample preparation, chromatographic analysis, analytical toxicology, clinical toxicology, forensic toxicology, hair analysis, accreditation and quality control issues, alternative specimens (oral fluid, sweat, hair, meconium, umbilical cord, placenta), the establishment of cut-off values, therapeutic/toxic doses, the development of new extraction techniques, hair analysis for abused drugs, doping control, and workplace drug testing. He has authored or co-authored more than 180 communications presented at scientific meetings, 1 international patent, 1 book, and 100 papers published in scientific journals, including book chapters. He has supervised and co-supervised the completion of 4 PhD (2 of which will be finished by the end of 2023) and 35 MSc theses.