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Read about Canadian hair follicle test marijuana.

Hair follicle drug testing is a great way to detect whether a person is under the influence of an illegal drug or not. It is widely used in Canada to determine the use of drugs in the past 90 days by the subject. Like benzodiazepines drug test, marijuana can also be detected using a hair follicle drug test. Marijuana is the most commonly abused and tested for drug in unites states and many other nations as well. Whether in an office or at home a hair drug test serves the purpose of answering the questions about the subjects marijuana use.

Hair drug testing for marijuana is quite simple and merely requires a sample of hair to detect the history of years ago. Parents who suspect their teen for using drugs can collect a strand of hair from their pillow without the ward coming to know that they are suspected. Employers in Canada request for a sample of hair from their employees. Failing to provide a sample may be grounds for loosing the job. Once a hair sample is collected it is sealed in an envelope and sent to laboratory for analysis. Abusers often shave of their head with the hope that they might escape a hair follicle test but this wont help as hair on any part of the body can be used as a substitute.

With about an inch sample containing at least 50 strands of hair, labs can detect the use of marijuana. Hair drug testing is widely used in casino industries of Canada. People with darker shades of hair are 10-50 times more likely to test positive for the use of drugs due to the larger melanin content than the ones with lighter shades of hair. In a hair follicle drug test, the drugs deposited in the scalp can be detected by radioimmunoassay and ultrasensitive gas chromatography/mass spectrometry procedures. Along with marijuana these tests can effectively screen the presence of ecstasy, opiates, cocaine, meth and PCP.

If you wish to pass a drug test, then you must use hair follicle shampoos and conditioners that remove the drug metabolites from the scalp prior to the test.