A problem that many medical marijuana consumers face is how to pass hair follicle drug tests in the workplace. Yes, they consume it for medical ...

While hair analysis reveals drug use from 6 months ago with impressive sensitivity, it’s not without limitations. The test can occasionally produce false positives from environmental exposure ...

That’s why member carriers of the alliance supplement Department of Transportation urine testing by requiring truck drivers to also pass a hair drug test.

Do false positives happen in hair follicle testing? Georgia welfare records raise concerns.