--- title: "Hair ETG Alcohol Test: How It Works | AMH Nationwide" description: "Learn how the hair ETG alcohol test works to detect alcohol use over weeks. Understand sample collection and lab analysis. Call (877) 731-6362." author: "AMH Nationwide" date: "2026-08-27" tags: ["hair etg alcohol test how it works"] canonical: "https://amhnationwide.com/hair-etg-alcohol-test-how-it-works/" last_updated: "2026-08-27" --- # Hair ETG Alcohol Test: How It Works | AMH Nationwide **By AMH Nationwide** | August 27, 2026 Learn how the hair ETG alcohol test works to detect alcohol use over weeks. Understand sample collection and lab analysis. Call (877) 731-6362. --- The hair ETG alcohol test how it works involves collecting a small hair sample to detect ethyl glucuronide, a direct alcohol metabolite, providing a detection window of up to 90 days. Samples are sent to national labs for screening, confirmation, and Medical Review Officer evaluation. Call (877) 731-6362. OVERVIEW ## What is the hair ETG alcohol test and how does it work? The hair [ETG](https://amhnationwide.com/hair-etg-alcohol-test/) alcohol test detects ethyl glucuronide (ETG), a direct metabolite of alcohol, deposited in hair strands. This test works by analyzing a small hair sample to reveal alcohol consumption over a period of up to 90 days. The ETG compound binds to hair keratin, allowing labs to identify alcohol use well beyond the short detection windows of blood or [urine](https://amhnationwide.com/urine-drug-testing/) tests. COLLECTION ## How is the hair sample collected for the ETG alcohol test? Hair sample collection for the ETG alcohol test involves cutting a small amount of hair close to the scalp, typically from the crown or back of the head. The sample size is usually about 100 strands or roughly 1.5 inches in length to cover the standard [detection window](https://amhnationwide.com/hair-follicle-drug-test-detection-window/). This collection is performed at authorized collection sites designated by AMH Nationwide. Sample location: Crown or back of head Sample length: Approximately 1.5 inches Sample size: Around 100 strands Collection performed at national network sites LAB ANALYSIS ## What happens during lab analysis of the hair ETG alcohol test? Upon receipt, the hair sample undergoes a multi-step laboratory analysis. Initially, a screening test identifies the presence of ETG using immunoassay or similar methods. Samples that test positive or inconclusive then proceed to confirmatory testing using gas chromatography-mass spectrometry (GC-MS) or liquid chromatography-tandem mass spectrometry (LC-MS/MS) to precisely quantify ETG levels. Screening: Immunoassay or equivalent method Confirmation: GC-MS or LC-MS/MS for accuracy Quantification of ETG concentration QUALITY CONTROL ## How is the hair ETG alcohol test result verified and reviewed? Every non-negative hair ETG test result undergoes review by a certified Medical Review Officer (MRO). The MRO evaluates laboratory findings alongside any relevant medical history or prescription information to rule out false positives or alternative explanations. This ensures the final test report is accurate and medically sound. ## Ready to arrange a hair ETG alcohol test? AMH Nationwide coordinates your test by providing the lab order and directing you to a nearby collection site within our five national lab networks. Contact us to begin the process. Call (877) 731-6362. [Call (877) 731-6362](tel:+18777316362)[Contact Us](https://amhnationwide.com/contact-us/) LAB NETWORKS ## Which laboratories process the hair ETG alcohol test samples? Hair ETG alcohol test samples collected through AMH Nationwide are routed to one of five national laboratory networks: [Quest Diagnostics](https://www.questdiagnostics.com/), [LabCorp](https://www.labcorp.com/), Omega Labs, United States Drug Testing Labs, or ExperTox. These labs follow strict chain-of-custody and testing protocols to guarantee reliable and compliant results. Quest Diagnostics LabCorp Omega Labs United States Drug Testing Labs ExperTox TESTING PROTOCOL ## Is the hair ETG alcohol test suitable for DOT-regulated testing? The hair ETG alcohol test is not used for Department of Transportation (DOT) safety-sensitive testing, which requires federally certified urine testing under [49 CFR Part 40](https://www.transportation.gov/odapc/part40). Hair ETG testing is primarily applied in non-DOT contexts where long-term alcohol monitoring is needed. AMH Reviewed & Maintained By AMH Nationwide Customer Service AMH Nationwide is BBB A+ accredited and routes every order through Quest Diagnostics, LabCorp, Omega Labs, United States Drug Testing Labs, or ExperTox, all of which use multiple lab certification agencies and standards such as [SAMHSA](https://www.samhsa.gov/workplace/drug-testing)-aligned laboratory protocols, the ANSI National Accreditation Board for forensic testing and calibration, the College of American Pathologists (CAP), and Clinical Laboratory Improvement Amendments (CLIA). Every non-negative screen is reviewed by a certified Medical Review Officer as part of standard processing before a result is released, and chain-of-custody documentation is maintained on every collection. This page does not constitute medical or legal advice. **Last updated:** July 2026 You May Also Need [Nail Drug TestingNo head or body hair available? A 5-panel fingernail test covers a similar look-back window.Learn more →](https://amhnationwide.com/5-panel-fingernail-drug-test/)[ChildGuard: Environmental ExposureConcerned about a child or loved one? ChildGuard screens for exposure to drugs in their environment.Learn more →](https://amhnationwide.com/5-panel-hair-drug-test-environmental-exposure-childguard/)[Shorten the Detection WindowShortened options like 30 and 60 day hair panels are also available, useful when a urine test’s 1-3 day window is too short.Learn more →](https://amhnationwide.com/30-day-hair-drug-test/)[Hair ETG Alcohol TestAlso need alcohol testing? The hair ETG test screens for alcohol use, and can be added to the same collection.Learn more →](https://amhnationwide.com/etg-and-peth/) Frequently Asked Questions ## Common Questions The hair ETG alcohol test can detect alcohol consumption for up to 90 days, as ETG accumulates in hair strands over time. This extended detection window allows for long-term monitoring compared to urine or blood tests. Approximately 100 hair strands about 1.5 inches in length are collected close to the scalp, usually from the crown or back of the head, to provide sufficient material for accurate ETG analysis. Initial screening uses immunoassay techniques, and any positive or inconclusive results are confirmed with gas chromatography-mass spectrometry (GC-MS) or liquid chromatography-tandem mass spectrometry (LC-MS/MS) for precise ETG quantification. A certified Medical Review Officer (MRO) reviews all non-negative results to verify accuracy and consider medical explanations, ensuring the final report is reliable and medically validated. No, DOT-regulated testing requires federally certified urine testing under 49 CFR Part 40. The hair ETG test is intended for non-DOT settings requiring long-term alcohol use detection. AMH Nationwide provides the laboratory order and directs you to a collection site within our national lab networks. There is no online ordering. To arrange testing, call (877) 731-6362. Sources • [SAMHSA – Mandatory Guidelines for Federal Workplace Drug Testing Programs](https://www.samhsa.gov/workplace/drug-testing) • [U.S. DOT – 49 CFR Part 40 – Procedures for Transportation Workplace Drug and Alcohol Testing Programs](https://www.transportation.gov/odapc/part40) • [CDC – National Center for Health Statistics – Drug Use FastStats](https://www.cdc.gov/nchs/fastats/drug-use.htm) • [Quest Diagnostics – Employer Solutions, Hair Testing Methodology](https://www.questdiagnostics.com/) • [LabCorp – Occupational Testing Services](https://www.labcorp.com/) ## Ready to get started? AMH Nationwide provides the lab order and arranges collection nationwide. Every non-negative result reviewed by a certified Medical Review Officer. Call (877) 731-6362 or contact us. [Call (877) 731-6362](tel:+18777316362)[Contact Us](https://amhnationwide.com/contact-us/) --- **Need a drug, alcohol, HIV or STD test?** AMH Nationwide is a national lab testing agency operating since 2004, with more than 20,000 collection sites across the United States. Hair, urine, fingernail and blood testing, panels from 5 through 19, for individuals and employers. - Call: (877) 731-6377 - Find a collection site: https://amhnationwide.com/locations/ - Full page: https://amhnationwide.com/hair-etg-alcohol-test-how-it-works/