Category: Ask the Experts

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.

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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.

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.

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Webinar: COVID-19 and the Workplace

May 5, 2020 By

Scientists from Quest Diagnostics presented a webinar called, “Ask the experts: COVID-19 and the Workplace." Watch a recording on-demand.

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Cold medicines and drug test results

February 11, 2020 By

During cold and flu season, questions arise about common cough medicines and their impact on drug test results. Get the facts.

Oral Fluid testing

Ask the experts: Is oral fluid drug testing legal?

August 15, 2019 By

Is it legal? Our experts discuss using oral fluid for regulated and non-regulated workplace drug testing programs.

Urine testing

What is a regulated drug test?

July 9, 2019 By

A regulated drug test typically involves a urine or alcohol collection performed for specific agencies categorized as “safety-sensitive” workplaces because of the potential influence of their job on public safety.

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Ask the expert: New marijuana law in Nevada

July 2, 2019 By

Nevada passed a law effective January 1, 2020 that places restrictions on how employers handle positive tests for marijuana for job applicants.