Hair Testing Overview

Hair testing, tweezer of brown hair cut with lab technician

Hair testing for drugs of abuse is the only drug testing method available that provides up to a 90-day drug use history.

Why Hair Testing

Hair Testing FAQs

Quest Diagnostics envelope and tweezers for hair collection for drug testing

What drug testing situations are best suited to a hair test? Is hair analysis appropriate for workplace drug testing other than pre-employment?

Read Our FAQs

Hair Testing Resources

Test tubes for hair and drug testing in the laboratory

Review our hair testing case study and see what existing clients are saying about their Quest Diagnostics hair testing program.

Download Case Study

Process and Certifications

Scientists in laboratory performing hair testing and drug testing

Our hair testing drug panels yield reliable results that allow you to look back at patterns of drug use.
See Our Test Panels

Hair Testing Collections

Quest Diagnostics yellow hair collection envelope for hair testing and drug testing

Locate a nearby collection site and utilize our resources to help you create the most effective hair testing program.
Collect a Hair Specimen