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Celebrating Lab Week

April 19, 2021 By

Every April, we honor our lab professionals during Lab Week. Their work makes a difference in helping to keep our workplaces safe and drug-free.

News

Challenging the poppy seed defense

April 13, 2021 By

A Quest Diagnostics study helps to answer the question: Can eating poppy seeds produce a positive drug test for a job applicant or employee?

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.

Hair testing

Common questions about hair testing

March 9, 2021 By

An expert from Quest Diagnostics answers some of the most common questions about hair drug testing.

White Papers

The new age of marijuana white paper

February 23, 2021 By

This white paper aims to shed light on the drug, its legal classification, and the importance of drug testing in the workplace.

Drug Testing

Would-be cheaters bet on synthetic urine

February 9, 2021 By

One popular way that an individual attempts to cheat a urine drug test is synthetic urine. Learn more about safeguards offered by trained collectors at Quest Diagnostics.

Drug Testing

Beyond pre-employment drug testing

February 2, 2021 By

Combining one or more reasons for testing is the best way to avoid hiring applicants who use drugs while discouraging drug abuse among employees.

Urine testing

Seven facts about urine drug testing

January 26, 2021 By

Why is urine testing the most frequently used method for workforce drug testing? Get the facts about urine testing from Quest Diagnostics.

Drug Testing

Does workforce drug testing work?

January 19, 2021 By

There is a wealth of research that shows that workforce drug testing can help to foster a healthy, safe, drug-free environment.