--- title: "Will cbd show up in hair drug test" description: "Will CBD show up in hair drug test? Learn how hair follicle tests detect substances and CBD's impact. Call (877) 731-6362 for expert guidance." author: "AMH Nationwide" date: "2026-08-28" tags: ["will cbd show up in hair drug test", "will cbd show up in hair drug test | will cbd show up on a hair follicle drug test"] canonical: "https://amhnationwide.com/will-cbd-show-up-in-hair-drug-test/" last_updated: "2026-08-28" --- # Will cbd show up in hair drug test **By AMH Nationwide** | August 28, 2026 Will CBD show up in hair drug test? Learn how hair follicle tests detect substances and CBD's impact. Call (877) 731-6362 for expert guidance. --- Will CBD show up in hair drug test? Hair drug tests analyze hair follicles for THC and other drug metabolites, not CBD itself. CBD products with trace THC may cause a positive result. Hair tests detect drug use over 90 days. For precise testing through national labs and certified review, call (877) 731-6362. BASIC INFO ## What substances does a hair drug test detect? A hair drug test detects the presence of drug metabolites in hair follicles. It typically screens for substances like THC (the active compound in marijuana), cocaine, opiates, amphetamines, and phencyclidine (PCP). CBD, or cannabidiol, is not usually targeted because it is not psychoactive and does not metabolize into the compounds these tests identify. Hair testing involves collecting a small sample of hair, usually from the scalp, which is then sent to a national lab network for analysis. AMH Nationwide routes samples through [Quest Diagnostics](https://www.questdiagnostics.com/), [LabCorp](https://www.labcorp.com/), Omega Labs, United States Drug Testing Labs, and ExperTox, ensuring consistent and reliable results. CBD & HAIR TESTS ## Will CBD show up on a hair follicle drug test? CBD itself does not show up on hair follicle drug tests because these tests do not look for cannabidiol or its metabolites. However, many CBD products contain small amounts of THC, which can accumulate in hair and trigger a positive test result. Hair follicle tests detect THC metabolites deposited in the hair shaft during the 90-day [detection window](https://amhnationwide.com/hair-follicle-drug-test-detection-window/). Even trace THC levels in some CBD products may be enough to be detected depending on usage frequency and product quality. TEST ACCURACY ## How reliable are hair drug tests in detecting THC from CBD use? Hair drug tests are highly sensitive and can detect THC metabolites at very low levels. The test results are reviewed by a certified Medical Review Officer (MRO) to confirm positives and rule out false positives. Because hair tests analyze long-term drug exposure, occasional use of pure CBD with negligible THC is unlikely to produce a positive result. However, regular use of CBD products with THC can result in detectable metabolite levels in hair samples. DETECTION WINDOW ## What is the detection window for THC in hair drug tests? Hair drug tests typically detect drug metabolites deposited in hair follicles over approximately 90 days. This means any THC exposure within that period can potentially be identified. Hair grows about half an inch per month, and a standard 1.5-inch hair sample represents roughly a three-month history of drug use. This detection window is longer compared to [urine](https://amhnationwide.com/urine-drug-testing/) or saliva tests. ## Need a Hair Drug Test? Contact AMH Nationwide to schedule hair follicle drug testing through certified labs. Call (877) 731-6362 for assistance. [Call (877) 731-6362](tel:+18777316362)[Contact Us](https://amhnationwide.com/contact-us/) TESTING PROCESS ## How does AMH Nationwide handle hair drug testing? AMH Nationwide provides the lab order and directs clients to one of over 20,000 nationwide collection sites. Samples are sent to one of five national lab networks: Quest Diagnostics, LabCorp, Omega Labs, United States Drug Testing Labs, or ExperTox for analysis. All non-negative hair drug test results undergo review by a certified Medical Review Officer to ensure accuracy and compliance with [SAMHSA](https://www.samhsa.gov/workplace/drug-testing), CAP, and CLIA standards. There is no online ordering; all testing requires contacting AMH by phone at (877) 731-6362. DOT & HAIR TESTING ## Is hair testing used for DOT-regulated drug screening? No, hair testing is not used for Department of Transportation (DOT) regulated drug screening. DOT requires urine testing under the federally certified protocol [49 CFR Part 40](https://www.transportation.gov/odapc/part40) for safety-sensitive positions. Hair drug tests are typically used for non-DOT employment, court, [probation](https://amhnationwide.com/hair-follicle-drug-test-probation/), or individual testing where long-term drug use history is relevant. 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-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 CBD oil that contains trace amounts of THC can cause a positive hair drug test result because hair tests detect THC metabolites. Pure CBD products without THC should not cause a positive. THC metabolites can be detected in hair for up to 90 days after use. If CBD products contain THC, that exposure may be reflected in hair samples collected within this window. Passive exposure to CBD or marijuana smoke is unlikely to produce detectable THC metabolite levels in hair. Hair testing reflects ingestion or consumption rather than environmental contact. Hair drug tests detect THC metabolites but do not detect CBD or differentiate between CBD and THC use. Positive results indicate THC exposure, not CBD. If a hair drug test is positive, a certified Medical Review Officer reviews the case. You can provide documentation about CBD use and product composition for evaluation. To arrange a hair drug test, call AMH Nationwide at (877) 731-6362. You will be directed to a collection site and the sample analyzed by a national lab network. 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/will-cbd-show-up-in-hair-drug-test/