Cannabinoids in hair testing is one way that employers test to see if a worker, or potential employee is using cannabis. It is also a method of drug testing used by some court systems and other government agencies.
Hemp oil, or hemp seed oil, is a very common ingredient in cosmetics that include; topical salves, lotions, and even hair care products like shampoo and conditioner.
Hemp oil is supposed to contain many beneficial properties while being void of actual cannabinoids that would get you high or have any psychoactive effect.
According to this research though, using hemp oil based shampoos and conditioners may actually make you test positive for cannabinoids – even when you have not consumed any.
If hemp oil really does cause someone to have a false-positive test for cannabinoids in hair, then this is proof we need to change the methods of drug testing as well as laws that allow testing for cannabinoids in hair in the first place.
Abstract The detection of cannabis constituents and metabolites in hair is an established procedure to provide evidence of exposure to cannabis. We present the first known evidence to suggest that applying hemp oil to hair, as cosmetic treatment, may result in the incorporation of Δ9-tetrahydrocannabinol (THC), cannabinol (CBN), cannabidiol (CBD) and in one instance, the metabolite 11-hydroxy-Δ9-tetrahydrocannabinol (THC-OH). 10 volunteers treated their head hair daily with commercially available hemp oil…
Hemp oil shampoo causing false positive for cannabinoids in hair test
Read more from the original cannabinoid research sources: