Hair drug testing is a type of testing in which a small bit of hair is used to test for evidence of drug use. While standard urine testing is appropriate for reasons such as post accident testing or reasonable suspicion because of it’s quick detection window, it is not suited for long term history checks. Hair testing on the other hand has a significantly longer detection window, up to 90 days after drug use. Hair testing also comes with the added benefit of being more secure than urine testing due to the nature of the test, along with every hair test being an observed test.
The 5-panel hair test includes testing for amphetamines, opiates, cocain, marijuana, and PCP.
The amount of hair needed for the test is cosmetically undetectable when collected. It is only a line about 1 centimeter long, about 1 or 2 strands thick.
There have not been any methods found yet that are known to cheat the test. Attempts to cheat the test are made especially difficult because of every test being observed by the collector.
Hair Follicle Testing is a common misnomer for the hair test. A standard hair test requires hair be cut as close to the scalp as possible, and not collected with hair follicle in tact. If an actual hair follicle test were to be performed, that would require the hair be plucked from the head, which would be much less convenient and comfortable for the person being tested.