Hair testing overview
Hair drug testing is the only testing method available that provides up to a 90-day drug use history, an effective way to evaluate long-term patterns of use.
Hair testing FAQs
What is the difference between hair testing and hair follicle testing? How much hair is cut to perform a drug test? Can a donor cheat a hair drug test?
Protecting safety
We discuss why Brazil chose hair testing for its professional drivers, most commonly-detected drugs, and regulations for the transportation industry.
