673 Search Results for: new to drug testing
Drug positivity rates continue at historically high levels
Marijuana positivity continues double-digit increases to keep overall drug positivity at historically high levels, according to the latest Quest Diagnostics Drug Testing Index.
Ask the Experts: Hair drug test collections
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.
Thwarting drug test cheaters
There are safeguards to help employers prevent a job applicant or employee who uses drugs from cheating or altering a drug test. Learn more.
Ask the experts: Hair testing vs. hair follicle testing
What is the difference between hair drug testing and hair follicle drug testing? We asked a Quest expert to explain.
Ask the experts: Effects of hair treatments on drug test results
Our scientific expert, Dr. Barry Sample, answers the question: Can products and treatments affect hair drug test results?
Ask the experts: The life of a drug testing specimen
Our labs handle more than eight million drug testing specimens yearly while maintaining an excellent track record of reliability and accuracy.
Common questions about hair testing
An expert from Quest Diagnostics answers some of the most common questions about hair drug testing.
The new age of marijuana white paper
This white paper aims to shed light on the drug, its legal classification, and the importance of drug testing in the workplace.
Beyond pre-employment drug testing
Combining one or more reasons for testing is the best way to avoid hiring applicants who use drugs while discouraging drug abuse among employees.
Seven facts about urine drug testing
Why is urine testing the most frequently used method for workforce drug testing? Get the facts about urine testing from Quest Diagnostics.
