Hair Testing for a 90-Day Drug Use History

Hair testing is one of the most accurate and effective methods of finding users of drugs of abuse. Using a small sample of hair, hair analysis evaluates the amount of drug metabolites embedded inside the hair shaft. When compared to the more traditional forms of testing, i.e. urine testing, hair samples can detect a longer period of drug use, up to 90 days! Because specimen collection can be directly observed the risk of adulteration is even further reduced. Hair testing is also legally defensible.

When compared with urine specimen testing, hair testing provides up to 2.5 times the number of positives and a longer detection window. Hair testing can test for the following classes of drugs:

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Hair Follicle Testing: