THC (9-tetrahydrocannabinol) is the primary active ingredient in cannabinoids (Marijuana).  When smoked or orally administered, it produces euphoric effects.  Long term relatively heavy use may be associated with behavioral disorders.  The THC One Step Marijuana Test Strip (Urine) is a rapid chromatographic immunoassay for the detection of 11-nor- 9-THC-9 COOH (THC metabolite) in human urine at a cut-off concentration of 50 ng/mL.  This test is for professional in vitro diagnostic use only and comes in bulk OEM form.