Hair drug testing
Browse our hair follicle shampoos to pass hair drug tests. For an explanation of some of the terms used please see our Drug Test Glossary. Also see pass a hair drug test, Drug test detection times and Drug testing cutoff levels
Hair drug testing is quite accurate. Dependent on the length of the hair strand and the concentration and frequency of drug use it could go back as long as 6 months.
Hair drug testing does have a number of downsides; 1. Persons of color tend to test innacurately; 2. You can test positive even if you are in the presence of marijuana without even using it.
Accredited labs test the hair sample about .5 inches from the scalp and discard the remaining hair. This generally gives a drug use history of about 30 days.
Hair Drug Testing Information
Hair drug testing generally needs about 50 strands of hair. The hair sample should be collected at an accredited lab with full chain of custody documentation. The hair is then sealed into a container until the hair drug test is performed. The hair drug test itself involves dissolving the hair in some type of chemical which will release toxins in the hair. The toxins are then analyzed for drug use.
Hair Drug Testing facts
RIAH (Radioimmunoassay of hair)
RIAH measures the drug molecules permanently entrapped in the hair following ingestion.
Hair drug testing can detect drug use for up to 6 months dependingon the drug used and the length of the hair sample.
There is no way to 'naturally' pass a hair drug test. Toxins must be removed with the use of a hair follicle shampoo.
Hair Drug Testing FAQ
How sensitive is hair testing in detecting drug users?
Hair testing can be as much as 5-10 times more effective in identifying drug users than urinalysis.
What drugs are included in a standard test?
Cocaine , marijuana, opiates, amphetamines and barbituates. Essentially the NIDA 5.
Can body hair be drug tested like hair from the head?
Body hair can be drug tested just as hair from the head.
How much hair is needed?
A standard screen with GC/MS confirmation requires 40+ milligrams of hair or approximately 50 - 70 strands that are up to 3.9cm (or 1.5 inches) in length. The thickness and pigment color of different types of head hair (thick black vs. thinning gray) is the basis of this variation.
For more information see our Ebook to pass a drug test section 'hair drug tests'.