Category: Hair testing

Hair testing

Ask the Experts: Hair drug test collections

August 4, 2017 By

The amount of hair needed for a hair drug test is approximately 100 milligrams made up of the first 1-½ inches from the root end. The hair is typically cut from the crown of the back of the head in a manner where it will not be as noticeable. Learn more about hair drug test collections.

Hair testing

Ask the experts: Effects of hair treatments on drug test results

June 27, 2016 By

Some employers who use hair drug testing as part of their workplace drug testing program ask if hair products can have an impact on their drug test results.

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Quest Diagnostics & Labet offer hair drug testing in Brazil

March 7, 2016 By

Quest Diagnostics and Labet offer hair drug testing for professional drivers in Brazil after a new law was passed to improve transportation safety.

Hair testing

Quest comments for hair specimen mandatory guidelines

August 5, 2015 By

HHS published an RFI seeking comments for federally-mandated hair drug testing. Here are our comments in response to the questions posed by HHS.

Hair testing

Request for hair drug testing information

May 29, 2015 By

The HHS published an RFI seeking comments on regulatory policies and standards regarding the use of hair specimen for federally-mandated drug testing.

Hair testing

Detect repetitive drug use with hair testing

February 12, 2015 By

Hair testing is a method many employers rely on to help identify periodic and habitual drug use by applicants and employees.

Hair testing

Hair testing and the Drug Testing Index

December 10, 2014 By

Compared to other drug test specimen types like urine and oral fluid, hair testing is often preferred for evaluating long-term patterns of drug use.

Hair testing

Ask the experts: Hair testing vs. hair follicle testing

July 3, 2014 By

We asked our scientific expert to better understand hair testing terminology and the hair testing collection process.

Hair testing

3,221 Drug users off the road thanks to hair testing

June 27, 2013 By

Positive results for drug use have kept more than 3,200 prospective drivers from getting behind the wheel for J.B. Hunt Transport Services Inc.

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Truck drivers and hair drug testing

May 28, 2013 By

While DOT regulations mandate urine drug testing, a number of motor carriers have found value in performing supplemental hair testing.