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Conventional methods of drug detection involve the analysis of urine or blood. Most drugs disappear from the blood within a few hours and urine within 2 – 3 days of use so that intermittent drug use can easily be concealed by abstaining.
Any drug that is present in the bloodstream will be incorporated into the protein layer of the hair through each hairstrand’s blood supply. As each strand grows, the drug will grow out with the hair. It is therefore an ideal matrix for detecting long term inappropriate drug and alcohol use as drugs are very stable in hair. Hair drug analysis differs from urine because it offers a substantially longer detection window (months to years), enabling retrospective investigation of past consumption.
Hair grows at an average rate of 1cm per month. Therefore, analysing the 3cm section of hair closest to the scalp will indicate drug use or abstinence during the 3-months prior to sample collection. Segmental analysis of a hair sample is often used to establish a trend in drug use or to correlate the location of the drug along the hair shaft with the time of ingestion.
APPLICATIONS OF HAIR TESTING
ADVANTAGES OF HAIR TESTING
COLLECTION AND TRANSPORTATION
Legally defensible hair sample collection is crucial to preserve specimen integrity. The documented chain-of-custody assures that the eventual test results are from the individual who donated the specimen and that the specimen was not tampered with.
At Expert Laboratory Services, hair samples are collected nationwide according to international guidelines. Procedures employed are ethically sound, legally correct, and carried out to respect a specimen donor’s dignity, privacy, and autonomy. Trained professionals in a drug-free environment carry out the collection of hair samples.
WRITTEN CONSENT
Individuals undergoing the drug test has to provide voluntary written consent. In the case of a minor, the parent needs to give written permission. Analytical test results will only be communicated to a third party with consent by the specimen donor.
AFFIDAVIT
Expert Laboratory Services are willing to issue an affidavit, which can be used in disciplinary
hearings and court procedures.
Having pioneered hair drug testing in South Africa, our team leads with an ethically sound, legally correct, and scientifically accurate service!
We are here to support you every step of the way!
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