--- title: "How to cleanse hair follicles for drug test" description: "Learn how to cleanse hair follicles for drug test with facts from AMH Nationwide. Understand detection and testing protocols. Call (877) 731-6362." author: "AMH Nationwide" date: "2026-08-28" tags: ["how to cleanse hair follicles for drug test"] canonical: "https://amhnationwide.com/how-to-cleanse-hair-follicles-for-drug-test/" last_updated: "2026-08-28" --- # How to cleanse hair follicles for drug test **By AMH Nationwide** | August 28, 2026 Learn how to cleanse hair follicles for drug test with facts from AMH Nationwide. Understand detection and testing protocols. Call (877) 731-6362. --- How to cleanse hair follicles for drug test is a common concern, but scientifically, hair drug tests detect drug use over 90 days and are difficult to alter. AMH Nationwide processes samples through five national lab networks with certified Medical Review Officers. For reliable testing information, call (877) 731-6362. TEST BASICS ## What is a hair follicle drug test and how does it work? A hair follicle drug test analyzes a small sample of hair to detect drug metabolites deposited in the hair shaft from bloodstream exposure. It typically detects drug use over a 90-day period, depending on hair length. Hair testing is used by employers, courts, and [probation](https://amhnationwide.com/hair-follicle-drug-test-probation/) agencies because it provides a longer [detection window](https://amhnationwide.com/hair-follicle-drug-test-detection-window/) than [urine](https://amhnationwide.com/urine-drug-testing/) or saliva tests. The test samples are sent to one of five national lab networks, including [Quest Diagnostics](https://www.questdiagnostics.com/) and [LabCorp](https://www.labcorp.com/), for processing. Every non-negative result is reviewed by a certified Medical Review Officer to ensure accuracy and compliance with federal guidelines. CLEANSING MYTHS ## Can hair follicles be cleansed to pass a drug test? Scientifically, hair follicles cannot be reliably cleansed to pass a drug test. Drug metabolites are incorporated into the hair shaft from the bloodstream and remain detectable until the hair grows out or is cut. Various products and home remedies claim to cleanse hair follicles, but none have been proven effective in peer-reviewed studies or by accredited labs. AMH Nationwide emphasizes that altering test results is not feasible through cleansing and that lab protocols, including Medical Review Officer review, maintain test integrity. DETECTION WINDOW ## What is the detection window for drugs in hair follicle tests? Hair follicle drug tests can detect drug use typically within the past 90 days. This detection window depends on the length of hair collected, usually 1.5 inches closest to the scalp representing approximately three months of growth. Drugs are deposited in the hair shaft as hair grows, making it possible to detect historical drug use rather than recent or one-time use. Because hair testing reflects long-term use, it is less effective for detecting very recent drug consumption compared to urine or saliva tests. TEST ORDERING ## How do I get a hair follicle drug test through AMH Nationwide? AMH Nationwide does not provide online ordering for hair follicle drug tests. To schedule a test, call (877) 731-6362 to obtain a lab order and be directed to one of over 20,000 nationwide collection sites. Tests are processed through one of five national lab networks: Quest Diagnostics, LabCorp, Omega Labs, United States Drug Testing Labs, and ExperTox. After collection, samples undergo strict chain-of-custody protocols and certified Medical Review Officer evaluation to ensure reliable results. ## Need a Hair Follicle Drug Test? Call (877) 731-6362 to get a lab order and be directed to a collection site near you. AMH Nationwide works with top labs to provide accurate results. [Call (877) 731-6362](tel:+18777316362)[Contact Us](https://amhnationwide.com/contact-us/) DOT REGULATIONS ## Is hair follicle testing used for DOT-regulated drug testing? Hair follicle drug testing is not approved for Department of Transportation (DOT) regulated safety-sensitive positions. The DOT mandates urine testing under the federally certified urine protocol [49 CFR Part 40](https://www.transportation.gov/odapc/part40). Hair testing is sometimes used for non-DOT roles or as part of [pre-employment](https://amhnationwide.com/pre-employment-hair-testing/) or forensic testing when a longer detection window is desired. AMH Nationwide follows all regulatory requirements and directs clients to appropriate testing methods based on the intended use. TEST ACCURACY ## How reliable and accurate are hair follicle drug tests? Hair follicle drug tests are highly reliable when conducted by accredited labs following strict protocols. The use of five national lab networks and certified Medical Review Officers ensures that results are accurate and defensible. False positives are rare due to confirmatory testing by methods such as gas chromatography-mass spectrometry (GC-MS). Environmental exposure to drugs is unlikely to cause a positive hair test since metabolites must enter the hair from the bloodstream. 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 No shampoo or detox product has been scientifically proven to cleanse hair follicles of drug metabolites. Hair drug tests detect drugs embedded in the hair shaft, which are not removed by washing. Drugs typically appear in hair about 5 to 10 days after use, as hair grows out from the follicle and incorporates metabolites from the bloodstream. Cutting hair can remove recent growth containing drug metabolites, but labs may collect hair from multiple sites. Complete removal is difficult and may raise suspicion. Passive exposure is unlikely to produce a positive hair test because metabolites must enter the bloodstream to be incorporated into hair. Common drugs detected include marijuana, cocaine, opiates, amphetamines, PCP, and others depending on the testing panel requested. Costs vary by panel and detection window. Contact AMH Nationwide at (877) 731-6362 for a quote and test options. 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/how-to-cleanse-hair-follicles-for-drug-test/