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 Hair
testing is the most accurate and effective method of finding
users of drugs of abuse. Using a small sample of hair cut at
the scalp, hair analysis evaluates the amount of drug
metabolites embedded inside the hair shaft.
When compared to the more traditional forms of testing, i.e.
urine testing, hair samples can detect a longer period of
drug use. With urine, most drugs are undetectable if
urinalysis is done more than 2-3 days after use, with the
exception of marijuana, which may be detected for a slightly
longer period of time. After the 2-3 day period, a urine
donor will test negative and slip through the urine
screening process. With hair samples, the only time
limitation for detecting drug usage is imposed by the length
of the donor’s hair. Each ½ inch of head hair provides a
30-day history of drug use. The standard for the industry is
to test 1.5 inches, which provides a 90-day history of the
donor’s drug use.
If no head hair is available, body hair can be used.
Bleaches, shampoos and external contaminants (i.e. marijuana
smoke) have no known impact on test results.
Collection of hair samples can be done at one of the
hundreds of locations across North America in the Omega
Collection Network. If you would prefer to provide your own
collection, we can train and certify your personnel in the
proper hair sample collection process. |
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