“…Therefore, alternative sampling materials are needed. In forensic toxicology, the list of alternative matrices includes oral fluid [ 2 , 3 ], hair [ 4 , 5 ], sweat [ 6 , 7 ], meconium [ 8 , 9 ], breast milk [ 10 , 11 ], vitreous humor [ 12 , 13 ], bile [ 14 , 15 ], and even insects [ 16 , 17 ]. However, the alternative materials present limitations, such as limited xenobiotic accumulation (according to physical–chemical properties), the eventual need for more sensitive analyses, or the inability to correlate xenobiotic concentrations with effects [ 18 ].…”