Can hair products cause a hair drug test result to show positive for illegal drug use?permanent hair

Nope. Can't use that excuse when you fail your drug test.

Can hair products cause a hair drug test result to show positive for illegal drug use?permanent haircolor?

No....just about all the methods drug users partake of to try and fool the drug tests have been identified. Best thing to do, though I am not saying YOU are a drug user, is to stop the drug use, drink copius amounts of water and pray, for 6 solid weeks. And if the test is hair follicle, well, nothing can save you. smiling

Can hair products cause a hair drug test result to show positive for illegal drug use?permanent haircolor?

no.your hair contains your DNA, and hair color and hair gel won't change your DNA