How does Hair Testing compare to urinalysis?
The primary differences are:
- Wider window of detection
- Inability to tamper with the test
Cocaine, methamphetamine, opiates and PCP are rapidly excreted and usually undetectable in urine 72 hours after use. The detection period for hair is limited only by the length of the hair sample and is approximately 90 days for a standard test.
At this time there are no known adulterants for hair tests. Since hair tests analyze the drugs inside the hairshaft, external contaminants/chemicals have no effect.
Additional advantages include non-intrusive collection procedures, virtual
elimination of test evasion.
The combination of an increased window of detection and resistance to evasion makes Hair Testing far more effective than urinalysis in correctly identifying drug users.
What is Hair Drug Testing?
Since hair growth is fed by the bloodstream, the ingestion of drugs of abuse is revealed by analyzing a small sample of hair. Our testing method measures the drug molecules embedded inside the hairshaft, eliminating external contamination as a source of a positive test result. Hair testing results cannot be significantly altered with shampoos or other external chemicals.
What drugs are included in a standard Hair Drug Test?
Cocaine, marijuana, opiates (Codeine, Morphine & 6-monoacteyl morphine), methamphetamine, (Meth/amphetamine & Ecstasy), and phencyclidine (PCP). These five drug classes are mandated for testing by the Federal Government.
What time period does a standard test cover?
A standard test covers a period of approximately 90 days. The hair sample is cut as close to the scalp as possible and the most recent 1.5 inches are tested.
Does hair color affect results?
Hair color is determined by the amount of melanin in the hair. It has been shown experimentally, through actual hair samples, as well as determined in court that hair color has NO basis in fact.
How fast does head hair grow?
Studies indicate that head hair grows on the average approximately 1.3 cm (or 1/2 inch) per month.
How much hair is needed?
A standard test with GC/MS confirmation requires 60+ milligrams
of hair or approximately 90 to 120 strands. The thickness of different types of head hair (thick coarse vs. thinning fine) is the reason for this variation.