Category: Hair testing


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.

Hair testing

See our hair drug testing lab in action

May 15, 2013 By

We are proud of our hair testing laboratory and the contribution we make to help keep the workplace safe.

Hair testing

Hair testing 101: Combing through the science

May 6, 2013 By

Hair drug testing is the only method that provides up to a 90-day drug use history. View our webinar, “Hair Testing 101: Combing through the Science.”

Hair testing

Hair drug testing resources

January 21, 2013 By

Quest Diagnostics offers additional resources about hair testing for illicit drug use at

Hair testing

Trucking and hair testing

August 13, 2012 By

More trucking companies are electing to perform a hair drug test in addition to the urine test.

Hair testing

Hair testing industry standardization

June 25, 2012 By

For nearly two decades, we have been reliably and accurately screening for drugs of abuse in hair using our enzyme immunoassay (EIA) technology.

Hair testing

Hair testing from a leader in science and service

January 31, 2012 By

Hair testing provides up to a 90-day detection of repetitive drug use, which can act as a powerful drug use deterrent.

Hair testing

Hair testing enhancements

July 18, 2011 By

During the past 18 months we have made several hair testing changes and enhancements.

Hair testing

Expanded opiate detection added to hair testing

February 2, 2011 By

Quest Diagnostics will begin to offer testing for expanded opiates – prescription opiates to our hair testing confirmation process.

Hair testing

Hair testing advantages

August 9, 2010 By

There are a number of advantages that hair drug testing from Quest Diagnostics offers over alternative testing methods. See the benefits.