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Author: Admin | 2025-04-28
A hair follicle drug test is one way to screen for recreational drug use or prescription drug abuse. A section of hair, about 200 strands, is sent to a lab for testing. One of the benefits of follicle drug tests is that they can show whether someone used or abused drugs as far back as three months before the test. The test can pick up drugs or drug metabolites inside the hair shaft that have been deposited through the bloodstream. Like urine tests, the drugs that can be detected will vary depending on the chosen panel. A standard five-panel test looks for:CannabisAmphetamines, including MDMA (ecstasy) and MDEA (eve)MethamphetamineCocaineOpioids, including heroin, fentanyl, codeine, and oxycodonePhencyclidine (PCP) Read on for more information about hair follicle drug testing, how it’s done, and how accurate it is. SandraMatic / Getty Images Why Is a Hair Follicle Drug Test Necessary? Drug tests are used to show drug use or misuse. Follicle drug tests can be used in: Workplaces to screen applicants, periodically test employees, or test employees after an accident or other issueForensic and legal testing, including during criminal investigations or child protection casesDrug rehabilitation programs to check for long-term drug use/abuse How a Hair Follicle Drug Test Works When a person uses drugs, they go into the bloodstream. Because each hair follicle has a blood vessel, drugs can travel through the bloodstream into the hair follicle. When the drug is processed (or metabolized) by a person's body, it creates byproducts called metabolites. These metabolites
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