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Chemical hair analysis may be considered for retrospective purposes when blood and urine are no longer expected to contain a particular contaminant, typically three months or less. Its most widely accepted use is in the fields of forensic toxicology, in pre-employment drug testing and, increasingly, in environmental toxicology.
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.
Cannabis use is detectable with hair tests and is generally included in the standard hair test. Hair tests generally take the most recent 1.5 inches of growth and use those for testing. That provides a detection period of approximately 90 days. [5] If an individual's hair is shorter than 1.5 inches, this detection period will be shorter.
Psychemedics Corporation is a leading global provider of innovative hair testing for drugs of abuse. With a commitment to accuracy and reliability, the company offers cutting-edge drug testing solutions. Psychemedics Corporation is dedicated to providing valuable insights and maintaining the highest standards in substance abuse testing.
The telogen phase gets longer, so hair doesn’t return to the hair regrowth phase quickly enough to replace natural shedding. The hair follicle is destroyed beyond repair and can no longer go ...
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]
Pet hair and pet dander can end up just about everywhere, making it important to regularly vacuum and dust at home if you’re allergic to your pet. Another way to help tamp down on pet dander ...
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.
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