Category: Blog Series

Ask the Experts

Ask the Experts: Drug testing cutoffs

June 15, 2021 By

Employers should carefully select a drug test specimen type and cutoff level based on the desired window of detection and regulatory requirements.

Hair testing

Ask the Experts: Hair drug test collections

May 18, 2021 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.

Ask the Experts

Ask the experts: Secondhand marijuana smoke

May 11, 2021 By

Can you fail a drug test from secondhand smoke? There are no published, peer-reviewed studies to date that indicate someone would test positive on a drug test due to incidental exposure of marijuana smoke. Learn more from Dr. Barry Sample, Quest Diagnostics.

Hair testing

Ask the experts: Hair testing vs. hair follicle testing

April 27, 2021 By

What is the difference between hair drug testing and hair follicle drug testing? We asked a Quest expert to explain.

Hair testing

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

April 6, 2021 By

Our scientific expert, Dr. Barry Sample, answers the question: Can products and treatments affect hair drug test results?

Ask the Experts

Ask the experts: The life of a drug testing specimen

March 23, 2021 By

Our labs handle more than eight million drug testing specimens yearly while maintaining an excellent track record of reliability and accuracy.

Reasons for Testing

Random drug testing benefits employers

January 12, 2021 By

As drug use continues to rise, it is more important than ever to combine pre-employment testing with a random drug testing program.

Ask the Experts

COVID-19 and the global impact on the drug market

July 14, 2020 By

New research from the United Nations Office on Drugs and Crime (UNODC) examines drug production and raw materials, drug trafficking amongst border restrictions, and individual drug consumption while quarantined.

By the Numbers

By the Numbers: Customer support

July 9, 2020 By

In this edition of "By the Numbers," we look at the numerical values that enable our Customer Support team to serve our customers effectively.

Oral Fluid testing

Ask the experts: Is an oral fluid drug test safe?

June 9, 2020 By

During the novel coronavirus health crisis, many employers ask is if an oral fluid drug test is safe in the current circumstances. Under rigorous safety procedures, drug testing continues across the country.