Category: Forensic Toxicology

Does Bleaching Hair Affect a Hair Follicle Drug Test?

Short answer: Yes. Bleaching can affect what a hair drug test—often called a “hair follicle test”—measures. Bleach, permanent dye, relaxers, and other chemical treatments can change drug concentrations in hair. The effect varies by drug, treatment, hair condition, and laboratory method. Cosmetic treatment does not reliably make a person “pass”…

How Real Is Toxicology Testing On TV

This article explains How Real Is Toxicology Testing On TV and the scientific, legal or practical evidence readers should understand.

Types Of Drug Tests In The 21st Century

This article explains Types Of Drug Tests In The 21st Century and the scientific, legal or practical evidence readers should understand.

Drug Toxicology: Alcohol vs Drug related DUI

This article explains Drug Toxicology: Alcohol vs Drug related DUI and the scientific, legal or practical evidence readers should understand.

A Short History of Forensic Toxicology

This article explains A Short History of Forensic Toxicology and the scientific, legal or practical evidence readers should understand.

Drug Toxicology: Impairment & Driving

This article explains Drug Toxicology: Impairment & Driving and the scientific, legal or practical evidence readers should understand.

Drug Testing: Sweat Patches 101

This article explains Drug Testing: Sweat Patches 101 and the scientific, legal or practical evidence readers should understand.

NarcoPouch Test False Positive Dilemma

This article explains NarcoPouch Test False Positive Dilemma and the scientific, legal or practical evidence readers should understand.

Toxicology Lawyer Talks Drug Testing in The Workplace

This article explains Toxicology Lawyer Talks Drug Testing in The Workplace and the scientific, legal or practical evidence readers should understand.

Advances in Tools For the Forensic Toxicologist

This article explains Advances in Tools For the Forensic Toxicologist and the scientific, legal or practical evidence readers should understand.

Drug Testing Myths

This article explains Drug Testing Myths and the scientific, legal or practical evidence readers should understand.

Hair Testing – Hair All About It!

This article explains Hair Testing – Hair All About It! and the scientific, legal or practical evidence readers should understand.

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Recent Blog Articles

Edibles and Alcohol Worsened Simulated Driving Without a Detected Rise in THC Exposure

Greater impairment from combining THC edibles and alcohol did not require a statistically detected increase in circulating THC in a controlled study. Driving effects increased under co-use while the measured cannabinoid pharmacokinetic outcomes did not significantly differ from the corresponding cannabis-only conditions. A specific sequence of exposure Twenty-five adults completed…

Read Article: Edibles and Alcohol Worsened Simulated Driving Without a Detected Rise in THC Exposure

Diluting a Cannabinoid Urine Sample Did Not Preserve Every Analyte Equally

A dilution factor is not automatically a valid correction for every compound in a cannabinoid panel. During validation of a urine LC–MS/MS assay, a greater dilution preserved acceptable results for some metabolites while causing unacceptable losses for several other targets. Why laboratories validate dilution separately The method directly measured THC,…

Read Article: Diluting a Cannabinoid Urine Sample Did Not Preserve Every Analyte Equally

A Validated Automated THC Serum Method Still Had a Postmortem Limitation

A successful cannabinoid method validation does not establish suitability for every specimen. Researchers who developed an automated serum assay explicitly reported that postmortem samples could form a gel during extraction that the standard centrifugation procedure could not reliably separate. What the automated method measured The GC–MS workflow measured THC, 11-hydroxy-THC…

Read Article: A Validated Automated THC Serum Method Still Had a Postmortem Limitation