What are the recent advances in forensic oral fluid bioanalysis?

“Oral-fluid testing is now steadily implemented in most forensic toxicology laboratories worldwide, particularly due to the ease of sampling and possibility to be used as a blood or plasma substitute, in assessing drug exposure.” Analysis of biological specimens of human origin is the key feature in assessing exposure to drugs. Several types of samples are often analyzed in routine forensic toxicology analysis, which usually include blood and urine samples. These samples present several well-established advantages, namely the positive correlation between blood concentrations and the observed symptoms, and the high concentrations at which the drugs usually appear in urine. However, sample...