--- title: "Will cbd fail hair drug test" description: "Will CBD fail a hair drug test? CBD itself is not detected, but some products contain THC. Learn facts and testing details. Call (877) 731-6362." author: "AMH Nationwide" date: "2026-08-28" tags: ["will cbd fail hair drug test", "will cbd fail hair drug test | will cbd fail a hair follicle drug test"] canonical: "https://amhnationwide.com/will-cbd-fail-hair-drug-test/" last_updated: "2026-08-28" --- # Will cbd fail hair drug test **By AMH Nationwide** | August 28, 2026 Will CBD fail a hair drug test? CBD itself is not detected, but some products contain THC. Learn facts and testing details. Call (877) 731-6362. --- Will CBD fail a hair drug test? CBD alone does not cause a positive hair drug test since standard tests do not target it. However, many CBD products contain trace THC, which hair follicle drug tests detect. Hair tests have a detection window of up to 90 days and are highly accurate. For precise information and lab testing guidance, call (877) 731-6362. TEST BASICS ## What is a hair drug test and does it detect CBD? A hair drug test analyzes hair samples to detect drug metabolites, primarily THC, cocaine, opiates, amphetamines, and PCP. It does not test for CBD because CBD is not a controlled substance and is chemically different from THC. The test looks for THC metabolites that indicate marijuana use, not CBD itself. [Detection window](https://amhnationwide.com/hair-follicle-drug-test-detection-window/): up to 90 days Sample: 1.5 inches of hair closest to scalp Lab networks: [Quest Diagnostics](https://www.questdiagnostics.com/), [LabCorp](https://www.labcorp.com/), Omega Labs, United States Drug Testing Labs, ExperTox Hair drug tests provide a long-term view of drug use by detecting substances incorporated into hair shafts. CBD does not produce these metabolites, so it is not detected by hair follicle testing. CBD PRODUCTS ## Can CBD products cause a positive hair drug test? Yes, some CBD products can cause a positive hair drug test because they may contain trace amounts of THC. Full-spectrum CBD oils and tinctures often include THC up to 0.3%, which can accumulate and show up on drug tests. Broad-spectrum and CBD isolate products typically have no THC or negligible amounts. Full-spectrum CBD: contains THC up to legal limits Broad-spectrum CBD: usually THC-free but may have trace amounts CBD isolate: pure CBD, no THC Because hair tests detect THC metabolites, consuming full-spectrum CBD products may result in a positive test. The risk depends on product type, frequency, and dosage. Contact AMH Nationwide at (877) 731-6362 for guidance on testing and product concerns. TEST ACCURACY ## How accurate are hair drug tests in detecting THC from CBD use? Hair drug tests are highly accurate and sensitive to THC metabolites. All non-negative results undergo review by a certified Medical Review Officer (MRO) to confirm findings, reducing false positives. The testing process is standardized and conducted through five national lab networks, ensuring reliability. Certified MRO reviews all positive results Testing labs include Quest Diagnostics, LabCorp, Omega Labs, United States Drug Testing Labs, ExperTox [SAMHSA](https://www.samhsa.gov/workplace/drug-testing)-aligned and CLIA certified testing protocols Because of this strict process, a positive hair drug test result due to THC from CBD product use is credible. If you have concerns about a test, contact (877) 731-6362 to discuss next steps. DETECTION WINDOW ## What is the detection window for THC in hair after CBD use? Hair drug tests can detect THC metabolites incorporated into hair follicles up to 90 days after use. This long detection window means that even infrequent use of CBD products containing THC may be detected weeks later. The exact detection depends on hair growth rate and THC exposure level. Typical detection window: 1 to 3 months Hair sample length analyzed: about 1.5 inches THC metabolites accumulate in hair shaft over time Because CBD itself is not detected, only THC exposure matters. If a CBD product contains THC, positive results may appear within this detection window. For detailed lab testing information, call (877) 731-6362. ## Questions About CBD and Hair Drug Testing? Contact AMH Nationwide at (877) 731-6362 for expert guidance on hair drug testing protocols, product risks, and lab services. [Call (877) 731-6362](tel:+18777316362)[Contact Us](https://amhnationwide.com/contact-us/) DOT TESTING ## Will CBD cause a positive result on a DOT hair drug test? DOT-regulated hair drug tests follow strict federally certified [urine](https://amhnationwide.com/urine-drug-testing/) protocols under [49 CFR Part 40](https://www.transportation.gov/odapc/part40) and do not use hair testing for safety-sensitive positions. Hair testing is used only for non-DOT roles. Therefore, CBD will not cause a positive DOT hair test because DOT hair testing is not standard for safety-sensitive employees. DOT hair testing not used for safety-sensitive roles Urine tests follow federally certified protocols Hair testing applies to non-DOT positions Employers should confirm testing requirements with AMH Nationwide. For DOT-related drug testing questions, call (877) 731-6362. TEST ORDERING ## How do I arrange a hair drug test to check for THC from CBD? AMH Nationwide provides lab orders and directs you to one of 20,000+ collection sites nationwide. We do not offer online ordering. To arrange a hair drug test, call (877) 731-6362 to speak with a representative who will help you select the appropriate test panel and coordinate collection. Testing routed through Quest Diagnostics, LabCorp, Omega Labs, United States Drug Testing Labs, and ExperTox Certified MRO reviews all non-negative results Pricing varies by panel and detection window Contact AMH Nationwide at (877) 731-6362 for accurate hair drug testing services and support. 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 No, pure CBD oil without THC does not cause a positive hair drug test because the test detects THC metabolites, not CBD. If the CBD product contains THC, even occasional use can result in detectable THC metabolites in hair samples, causing a positive result. Hair tests provide a longer detection window (up to 90 days) and are highly accurate, but urine tests detect more recent use within days to weeks. Passive exposure to CBD products without THC is unlikely to cause a positive hair test. Passive marijuana smoke exposure rarely leads to positive hair test results. No, AMH Nationwide does not test for CBD because standard drug tests focus on controlled substances like THC, not CBD. THC metabolites can be detected in hair for up to 90 days after last exposure. The exact time depends on hair growth and amount of THC consumed. 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-fail-hair-drug-test/