A 2005 review published by the National Drug Court Institute states that THC detection times rarely exceeded 30 days. According to a May 2017 review published in Mayo Clinic Proceedings, weed can be detected in urine for up to three days in occasional users, five to seven days in moderate users, 10 to 15 days in daily users, and more than 30 days for chronic users who consume multiple times a day.
In most cases, it’s highly unlikely that CBD will show up on a drug test. Usually employment drug tests look for the presence of THC or THC metabolites. Most employers abide by the guidelines set forth by the Substance Abuse and Mental Health Services (SAMHSA), which includes detection for THC but not CBD. Tests generally look for THC but how much and how long THC sticks around depends on what’s being tested.
If you’re vaping or dabbing your CBD, it’s the same advice as above — look for concentrates made with isolate or crystalline to avoid THC completely. (If you smoke or vape flower, you’ll be consuming whatever level of THC is present in the bud, which is at least 0.3% even for hemp plants.)
Oral fluid tests
Recognized as the preferred method for cannabis drug testing, urine screenings are often used as a benchmark to detect for cannabis use. Most urine tests utilize a specific sensitivity for the cutoff concentration of THC-COOH. The most common cutoff concentration point is 50 nanograms per milliliter (ng/mL), as suggested by the Substance Abuse and Mental Health Services Administration (SAMHSA).
When consuming pure CBD, there is evidence you’ll be missing out on some health goodies conveyed by the entourage effect if you chose a full- or broad-spectrum CBD product instead. But it’s the only way to be certain there’s no THC in your CBD, and the only way to buy CBD in states with highly restrictive laws.
THC and its metabolites can also be detected in the saliva of occasional and chronic users. A 2014 study published in the journal Drug Testing and Analysis looked at cannabinoids in oral fluid and found that THC metabolites were detectable in the saliva of occasional users for one to three days and chronic users for up to 29 days.
While it’s possible that small amounts of THC that exist within a CBD product could accumulate and show up in a drug test, it’s still highly unlikely. Photo by: Gina Coleman/Weedmaps
Most CBD products are made from hemp, not marijuana.
For instance, if someone who had direct contact with marijuana then touched your hair, you could feasibly receive a false positive on a drug screening that tests your hair.
Reasons for Failing a CBD Drug Test
Cannabis is the umbrella term describing hemp and marijuana plants—two different varieties of the cannabis genus. Both marijuana and hemp can be described as cannabis plants; however, it is important to note that they are still two separate plants.
As it turns out, depending on the source of the cannabis that is used to produce the CBD oil, some products do contain traces of THC (including low-quality isolates and many full-spectrum tinctures).
CBD is one of many active chemical compounds in the cannabis plant. One reason it’s gaining momentum in popularity is because it is said to lack the component of the plant that causes a person to get high, which is called THC (tetrahydrocannabinol).