Category: Hair testing

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.

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

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

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

Our webinar series teaches you the fundamentals of the most popular drug test specimens to help employers execute a successful workforce drug testing program. Watch now.

SAMHSA has proposed scientific and technical guidelines for the inclusion of hair in Federal drug testing programs. Note: These are only proposed Guidelines and hair testing is not approved for any Federally mandated drug (eg, DOT) testing. Read all public comments online including those from Quest.

Hair drug testing can benefit all aspects of your business, but especially transportation.

Employers choose hair testing to help identify habitual and periodic drug users using its 90-day drug detection window. Get the facts.

Recent enhancements to our hair testing panels now allow for more specific testing for opiate-like or opioid drug such as oxycodone and its metabolites.

In the third and final installment of our webinar series, Back to basics, we focused on hair drug testing and combed through the key features.