Hair Testing FAQ's

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 altered with shampoos or other external chemicals.

Can hair be affected by cross-reacting substances such as over-the-counter medications?
Enzyme-immunoassay antibodies (EIA), similar to those used to test urine, are used for the initial screening test for drugs of abuse in hair; therefore the potential for substances such as over-the-counter medications to cause a false positive screening result does exist. To eliminate the possibility of reporting a false-positive due to cross-reactivity, Omega confirms all positive results by GC/MS for methamphetamine, opiates, PCP,cocaine and marijuana.

How effective is Hair Testing in detecting drug users?
In side-by-side comparison studies with urinalysis, hair drug testing has uncovered significantly more drug use. In two independent studies hair drug testing uncovered 4 to 8 times as many drug users as urinalysis.

Does external exposure to certain drugs, like marijuana or crack smoke, affect the Hair Test results?
To rule out the possibility of external contamination, Omega testing (where appropriate) looks for both parent & metabolite (bi-product) of drug usage. For marijuana analyses, Omega detects only the metabolite (THC-COOH) . This metabolite is only produced by the body and cannot be an environmental contaminant.