Category: Hair testing

Hair testing and the Drug Testing Index
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. Continue reading

By   /  December 10, 2014

Ask the experts: Hair testing vs. hair follicle testing
We asked our scientific expert to better understand hair testing terminology and the hair testing collection process. Continue reading

By   /  July 3, 2014

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

By   /  June 27, 2013

Common questions about hair testing
Quest Diagnostics answered many questions about hair drug testing during our webinar, but here are a few of the most commonly asked questions. Continue reading

By   /  May 29, 2013

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

By   /  May 28, 2013

See our hair testing lab in action
We are proud of our hair testing laboratory and the contribution we make to help keep the workplace safe. Continue reading

By   /  May 15, 2013

Hair testing 101: Combing through the science
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.” Continue reading

By   /  May 6, 2013

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

By   /  January 21, 2013

Trucking and hair testing
More trucking companies are electing to perform a hair drug test in addition to the urine test. Continue reading

By   /  August 13, 2012

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

By   /  June 25, 2012