Urine| Hair Follicle | Oral Fluid | Blood | ETG
Hair analyses have emerged as an effective means to identify drug and alcohol intake. Hair retains a comprehensive record of these substances by preserving biomarkers within the growing hair fibers. When cut near the scalp, hair can reveal a detection timeframe of up to roughly 3 months for alcohol and other substances. It's easy to collect, has a low risk of tampering, and is straightforward to transport.
A 1.5-inch portion comprising about 200 hair strands (equivalent to a #2 pencil in diameter) nearest the scalp yields 100mg, the optimal sample for preliminary and confirmatory testing. For EtG additions and/or tests exceeding 10 panels, 150mg of the sample is advised. We suggest using a jeweler’s scale to weigh the sample. If scalp hair isn't available, an equal amount of body hair can be used. By head hair, we mean scalp hair specifically, while body hair refers to other hair types (facial, axillary, etc.).
Process Overview
There are four foundational steps in the lab processing of a drug test result: Accessioning, Screening, Extraction, and Confirmation.
Accessioning includes the initial handling of a sample into the lab’s systems. This encompasses ensuring the sample was sealed and shipped correctly, assigning a random LAN (Laboratory Accessioning Number), and performing any extra data entry missing from an electronic chain of custody record.
Screening administers an initial swift assessment for substances of abuse. Although Screening is an economical method to dismiss drug consumption in most samples, a positive finding must be validated to be legitimate in legal contexts. Any samples deemed presumptively positive in Screening require a secondary verification.
If a specimen appears presumptively positive in the Screening stage, additional hair is taken from the original sample and readied for Extraction. During this phase, drugs are drawn from hair at much finer concentrations than other techniques (e.g., urine or saliva), thus making hair drug analysis the most complicated method to execute.
Any positive screening outcome must be confirmed with GC/MS, GC/MS/MS, or LC/MS/MS. All presumptive positive samples undergo washing before confirmation if necessary. The comprehensive lab process from Accessioning to Confirmation is scrutinized under both the CAP (College of American Pathologists) Hair classification and accreditation to ISO / IEC 17025 standards.
Advantages of hair drug testing:
Limitations:
Note: Frequently called "hair follicle tests", these tests analyze the hair strand instead of the hair follicle underneath the scalp.
Why Hair Follicle Testing Beats Urine Testing in Paradise, CA centers on its superior detection capabilities.
Extended Detection Window offered by hair follicle testing in Paradise, CA gives an expansive view of substance use for up to 90 days.
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