It’s difficult to say whether or not CBD will show up on a drug test, because the answer is based off of several factors. There are many types of drug tests, but they usually work by examining the presence of THC in your system through urine, saliva, blood, or hair follicle. If a user is determined to have more than 50 nanograms per milliliter of THC in their system, a positive drug test will be triggered. Some tests are more sensitive and will trigger a positive result at just 20 nanograms. Other factors include the overall sensitivity of the drug test, the method of testing used, the metabolism and processing speed of the individual taking the test, and the individual’s history of marijuana use.