Abstract
The determination of drugs of abuse in hair is now a routine technique in forensic toxicology laboratories following the Society of Hair Testing recommendations in 2004. It is an alternative biological sample that is, easily obtained, difficult to adulterate, does not require special storage conditions, and, furthermore, it demonstrates shows consumption prior to obtaining a blood or urine sample. For this reason, its applications are increasing in number, including the possibility of determining markers of chronic ethyl alcohol use. However, the analytical methods are not yet standardized; therefore, a correct interpretation of results must be performed, and the limitations of this biological sample must be taken into account.
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