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HAIR TESTING 

Testing hair for drugs of abuse, primarily Amphetamines, Cocaine, Opiates, and Phencyclidine (PCP) involves detecting drug use over an approximately 90-day period.  The regular, chronic user is most likely to show a positive result.  When a drug is ingested it enters the blood stream and then chemical particles as components of these drugs are deposited in the cortex of the hair as a permanent part of the hair strand.  Therefore, dyes, bleaches, and styling products will not affect the outcome of a hair test.  The reason that Marijuana is not included as part of the profile is due to inconclusive results.  A small sample of hair from the scalp will be taken and then analyzed by the laboratory.  It will first be washed and have its melanin (coloring) removed.  Any positive results will be confirmed by Gas Chromatography/Mass Spectrometry (GC/MS).

DDS when conducting a hair test will obtain a urine drug screen at the same time for comparison. At this time, DDS conducts hair/urine testing in the Houston, Texas area only.  Reliable home kits, when available, will be added to our shopping cart.

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