Hair Drug Testing Explained

Hair follicle drug testing can provide a defined record of what illegal substances a donor has used over a long period of time

. A hair test for drugs is a extremely valuable tool whenever you need to identify if the individual has had continual or intermittent drug use. A hair sample drug test will additionally indicate what months drugs were used in and what months there was none. Just how can a drug test be so accurate?

Hair Follicle Drug Testing

When a drug is taken, it is absorbed straight into the blood stream. Hair follicles possess their own blood supply so drugs that have already been consumed will be present and can remain there permanently.

Given that hair will grow at roughly 1.3 centimetres per month, a 4 centimetres piece will show a three-month profile of drug use. By breaking down the sample into 1.3 cm sections, a profile suggesting monthly drug use can become very evident.

Is a Hair Test for Drugs Adequate?

When compared to several other drug tests such as the frequently utilised urine test, if it is not carried out within 3 days following drug use, then drugs have a chance of staying undetected. The only exception to this rule is marijuana. The only issue on hair follicle drug testing, however, is the length of the sample the lab has to work with.

Given that a hair sample drug test is the most accurate procedure for identifying if an individual is a drug user, courts in the Uk widely accept its outcomes. Corporations and Unions all over the country do also.

A small sample is all that is needed to decide the amount of metabolites embedded in the hair follicle. The industry standard is to examine a sample of hair that is at least 4 centimetres long. This will result in a ninety day history of drug use. It has already been proven that there is no change in test results between a bleached hair and one that is normal. Since it takes roughly 5 days for hair to grow above the scalp, any drug used more than 5 days before can be found in hair follicle drug testing.

Body hair can easily be used if absolutely no hair from the head is available. Because most body hair is replaced once a year, test results on body hair will create a year of drug use history.

Could Over The Counter Drugs Produce a False Positive?

Because it is likely that certain over the counter drugs might produce a false positive during the hair sample drug test, any positive results are analysed more to identify what drugs have been flagged positively. Medical personnel may possibly also interview the donor to identify if any other medications may well have been flagged falsely.

Even though a drug test appears to have finality, in most instances it is just the start. If a donor has already been recognised with an addiction problem, a lot of resources available can help them conquer their dependency and lead a normal life.

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by: Chris Smith.

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