Tag: 90-day drug use history

Hair testing

What you need to know about hair drug testing

March 31, 2020 By

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

Hair testing

Ask the experts: Effects of hair treatments on drug test results

June 27, 2016 By

Some employers who use hair drug testing as part of their workplace drug testing program ask if hair products can have an impact on their drug test results.