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Hair Drug Testing Hair Drug Panels Hair Collection Instructions

Hair Videos

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Hair Infographics

There are currently no Fingernail Infographics. Please check back later.

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Hair Poster Presentations

The Detection of Propofol Glucuronide in Human Hair Using LC-MS/MS: Case Study and Survey of High-Risk Health Professionals

The Detection of Propofol Glucuronide in Human Hair Using LC-MS/MS: Case Study and Survey of High-Risk Health Professionals

Demethylated Metabolites of Oxycodone and Hydrocodone in Human Hair and Nail Specimens

Demethylated Metabolites of Oxycodone and Hydrocodone in Human Hair and Nail Specimens

Detection of Trace Buprenorphine and Norbuprenorphine in Human Hair Using Enzyme-Linked Immunosorbent Assay (ELISA)

Detection of Trace Buprenorphine and Norbuprenorphine in Human Hair Using Enzyme-Linked Immunosorbent Assay (ELISA)

Detection of Trace Naltrexone and 6β-Naltrexol in Human Hair Using Enzyme Linked Immunosorbent Assay (ELISA)

Detection of Trace Naltrexone and 6β-Naltrexol in Human Hair Using Enzyme Linked Immunosorbent Assay (ELISA)

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USDTL Hair Test In the News

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Hair Articles

On The Level: Screening and Confirmation Testing Explained 01-Aug-2017

Quantity Not Sufficient 11-Nov-2016

A Testimony from the field: Use The Right Test to find the Best Answer 28-Jul-2016

The Long Game 02-Feb-2015

The Stability of Drugs in Hair 01-Oct-2012

Fatty Acid Ethyl Esters: A New Method to Detect Heavy Alcohol Consumption in Hair 01-Jun-2005

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Hair Announcements

Kratom Drug Testing in Hair and Nail – Exclusively at USDTL

03-Aug-2020

Cotinine Detection in Hair and Nail Specimens

13-Sep-2021

Long-term detection of the nicotine biomarker cotinine is now available in hair and fingernail specimens. This test was created to determine the exposure of the donor to environmental tobacco smoke and can be added to any hair or nail test panel or ordered as a stand-alone test.

Adding Phenibut, Medetomidine, and Tianeptine Options for Umbilical Cord Tissue, Hair, and Nail Testing

10-Mar-2025

We are announcing the addition of phenibut, medetomidine, and tianeptine to our umbilical cord tissue, hair, and nail testing menus. These substances can be ordered as an individual test or an add-on to any umbilical cord tissue, hair, or nail drug panel.

Xylazine & Psilocin Testing in Hair/Nail, Gabapentin & DXM Testing in Urine, And More Cannabinoids in ChildGuard®

19-May-2025

We are excited to announce new offerings and improvements to our testing coming on May 19, 2025.

Report Change Notification

18-Apr-2016

Quantity Not Sufficient (QNS) Explained

02-Mar-2016

Updated Policy Regarding Insufficient Specimen Volumes Updated Collection Instructions

01-Apr-2015

USDTL Develops Assay to Detect Zolpidem (Ambien®) in Fingernails and Hair

01-Oct-2014

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USDTL Hair Research

Ethyl glucuronide in hair and ﬁngernails as a long-term alcohol biomarker 27-Mar-2014

The Detection of THCA Using 2-Dimensional Gas Chromatography-Tandem Mass Spectrometry in Human Fingernail Clippings: Method Validation and Comparison with Head Hair 01-Oct-2013

Liquid Chromatography-Tandem Mass Spectrometry Assay to Detect Ethyl Glucuronide in Human Fingernail: Comparison to Hair and Gender Differences 01-Jan-2012

Hair analysis versus conventional methods of drug testing 01-May-2010

The simultaneous determination of codeine, morphine, hydrocodone, hydromorphone, 6-acetylmorphine, and oxycodone in hair and oral fluid 01-Apr-2002

The determination of 11-nor-delta9-tetrahydrocannabinol-9-carboxylic acid (THC-COOH) in hair using negative ion gas chromatography-mass spectrometry and high-volume injection 01-Oct-2001

Deposition of 7-aminoflunitrazepam and flunitrazepam in hair after a single dose of Rohypnol 01-Sep-2001

Quantitation of clonazepam and its major metabolite 7-aminoclonazepam in hair 01-Oct-2000

Highly sensitive micro-plate enzyme immunoassay screening and NCI-GC-MS confirmation of flunitrazepam and its major metabolite 7-aminoflunitrazepam in hair 01-Oct-1999

The detection of cocaine in hair specimens using micro-plate enzyme immunoassay 01-May-1999

Detection of doxepin and its major metabolite desmethyldoxepin in hair following drug therapy 01-Oct-1998

Maternal cocaine use without evidence of fetal exposure 01-Oct-1994

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USDTL Assisted Hair Research

Afghanistan Treatment Center Study: Children’s Hair, Oral Fluid, and Urine Drug Testing 14-Nov-2014

Modeling Sources of Self-Report Bias in a Survey of Drug use Epidemiology 01-May-2005

Tobacco-Reporting Validity in an Epidemiological Drug-use Survey 01-Jan-2005

Drug Test Feasibility in a General Population Household Survey 08-Mar-2004

The Utility of Drug Testing in Epidemiological Research: Results from a General Population Survey 01-Feb-2004

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Foundational Hair Research

Heavy in utero ethanol exposure is associated with the use of other drugs of abuse in a high-risk population 21-Dec-2009

The efficacy of hair and urine toxicology screening on the detection of child abuse by burning 01-Jul-2009

Prenatal Cocaine Exposures and Dose-Related Effects on Infant Tone and Behavior 08-Dec-2006

Estimates of Illicit Drug use During Pregnancy by Maternal Interview, Hair Analysis, and Meconium Analysis 01-Mar-2001

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Hair White Papers

Psilocin: An Annotated Bibliography 25-Jun-2025

Ethyl Glucuronide (EtG) in Hair: An Annotated Bibliography 20-Mar-2014

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