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Hair grows at approximately the rate of ½ an inch per month and takes about 5 days to grow out past the external layer of skin. Psychemedics’ standard test uses a 1 ½ inch sample of head hair, which provides an approximate 3 month history of drug use. Body hair can also be collected if head hair is not available. [2]
Post-mortem hair sample analysis can also be performed, to allow for determination of long-term drug use or poisoning. [5] It is also used by employers, who test their employees. [6] Hair analysis has the virtue of showing a 'history' of drug use due to hair's slow growth.
Hair drug testing is a method that can detect drug use over a much longer period of time than saliva, sweat or urine tests. Hair testing is also more robust with respect to tampering. Thus, hair sampling is preferred by the US military [66] and by many large corporations, which are subject to Drug-Free Workplace Act of 1988.
Minoxidil (brand name Rogaine®) is a non-prescription topical medication that promotes hair growth and regrowth by restarting the growth phase in dormant hair follicles.
Labcorp performs its largest volume of specialty testing at its Center for Esoteric Testing in Burlington, North Carolina. [ 2 ] Labcorp was an early pioneer of genomic testing using polymerase chain reaction (PCR) technology at its Center for Molecular Biology and Pathology in Research Triangle Park, North Carolina , where it also performs ...
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In mainstream scientific usage, hair analysis is the chemical analysis of a hair sample. The use of hair analysis in alternative medicine as a method of investigation to assist alternative diagnosis is controversial [1] [2] and its use in this manner has been opposed repeatedly by the AMA because of its unproven status and its potential for healthcare fraud.
3 Behavioral Testing. ... 4 "Order of magnitude" unclear in section on hair tests for alcohol. 1 comment. 5 Should drug testing be legalized in schools? 1 comment.
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