128 citations
,
January 1996 in “Journal of analytical toxicology.” This study suggests that while hair analysis using GC-MS is a sensitive method for detecting cocaine ingestion, it may not reliably indicate the amount, timing, or duration of drug use due to interindividual variability and multiple incorporation mechanisms.
8 citations
,
February 1997 in “International journal of environmental analytical chemistry” This study determined that most elemental concentrations in Mexican medicinal plants were similar to agricultural products, with bromine being an exception.
8 citations
,
October 2014 in “Journal of analytical toxicology.” This study found that a single application of 'Lye' or 'No-Lye' chemical straighteners significantly reduced drug concentrations in hair samples from both drug-fortified standards and authentic drug users.
14 citations
,
May 2020 in “Drug Testing and Analysis” This study reports that hair analysis could potentially monitor metformin use in diabetic patients, suggesting a possible correlation between daily dose and concentration in dark hair but not in light hair.
59 citations
,
November 2018 in “Psychoneuroendocrinology” This study suggests that cerebrospinal fluid levels of the neurosteroids allopregnanolone and pregnanolone correlate negatively with PTSD and negative mood symptoms, with potential sex-specific differences in synthesis enzyme blocks.