Tag: specimen validity testing

Urine testing

3 Ways Cheaters Cheat

August 13, 2019

A drug testing program is only as good as its safeguards. Learn some of the most common ways people try to cheat a drug test and how to stop the cheaters.

Blog Series

A Closer Look: Series introduction

February 8, 2019

A new year brings new beginnings. That said, we are excited to introduce our new blog series called A Closer Look.

Urine testing

Add certainty with specimen validity testing

December 18, 2015

Quest Diagnostics offers specimen validity testing with varying levels of quality assurance to help ensure the integrity of a urine drug test.

Urine testing

How donors cheat drug tests

December 16, 2015

The use of oxidizing adulterants is one of the most common ways donors try to cheat a urine drug test. Our chart shows different kinds of adulterants.

Oral Fluid testing

Quest comments for oral fluid mandatory guidelines

August 3, 2015

HHS published Oral Fluid Mandatory Guidelines which opened a 60-day comment period. Here are our comments in response to the questions posed by HHS.

New to Drug Testing

New to drug testing: Specimen validity testing

February 14, 2014

Collectors keep donors from contaminating specimen, but also take measures at the laboratory to help ensure that your test results are accurate.