research Influence of Thermal Hair Straightening on Cannabis and Cocaine Content in Hair
Thermal hair straightening changes drug levels in hair, affecting test results.
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research Influence of Chemical Straightening on the Stability of Drugs of Abuse in Hair
Chemical hair straightening significantly reduces detectable drug levels in hair.
research Hair Analysis: Assessment of Homemade Hair Treatment Effects on Drug Concentrations in the Keratin Matrix
Homemade hair treatments can significantly lower drug levels in hair, possibly causing false-negative drug tests.
research Hair After Death
research External Post Mortem Artefact: A Key Issue in Hair Result Interpretation
Hair test results can be misleading due to external contamination, so they shouldn't be used alone to assess long-term drug use.
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