One of the major differences about drug testing in a corporate environment is that rather than using the standard urine test for marijuana drug testing, corporations generally use hair follicle testing instead. While urine testing is more cost effective, the down side is it has only has a small window of time that it drug tests for use. With hair testing, the span covered can spread as far as 3 years but is typically evaluated for the last 90 days before drug testing.

While the test itself may cost more, it is harder to cheat at hair testing. Moreover, hair drug testing is more effective for judging an overall period for the presence of drug use thus evading the mistake of hiring or retaining an employee who simply hides their use.

In addition to removing the need for the invasive monitoring associated with urine testing, hair follicle testing also saves time as it can be done in a much shorter time as compared to the time taken for urine testing. Saving time and offering the best possible environment for employees to work in makes hair testing well worth the added cost.