Sureproof way to pass hair follicle test?

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Employers and employees in the railway industry are covered under the regulations mandated by DOT. Under the regs, only body fluids are the specimens to be collected and tested - not hair.

Here is the link to the railway-specific Federal Regulations: eCFR — Code of Federal Regulations

Youre not all wrong. Not every position and not every company use them, but lots do. Ive been researching and a lot of people saying they get hair tested.