It is also difficult to estimate how many people in a year have suffered negative consequences, such as the loss of a job or parental rights, after testing positive for THC, because most drug testing data is private. Even data that is public can be difficult to parse. For instance, in many locales, official statistics around “drugged driving” do not distinguish between drivers who test positive for THC and those who test positive for other drugs, such as cocaine or methamphetamine.
Bruce Houlihan, director of the Orange County, Calif., crime lab and chair of the emerging drugs and opioids committee for the American Society of Crime Lab Directors, expressed concern. “If any labs are using this method, they’ll have to be careful,” Mr . Houlihan said. He added that there was no way to estimate how many drug testing labs might be accidentally mistaking CBD for THC, because forensic labs generally determine their methodology in house.
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Elizabeth had been taking the CBD product for a few weeks when she went in for a scheduled drug test. The company that produced the product is based in Colorado and appeared to be legitimate, she said, so she was shocked when she failed the drug test. “They were reputable,” she said. “They had their lab results on their website.”
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Barry Sample, the senior director of science and technology at Quest Diagnostics, the biggest purveyor of drug tests in the country, said he was familiar with the problem outlined in the 2012 paper, but said Quest Diagnostics did not use that methodology. “We use a different analytical procedure,” Dr. Sample said.
Elizabeth has been in touch with Mr. Conrad, but he is not serving as a witness in her case.
If you pass a drug test after taking CBD, it doesn’t necessarily mean you have traces of THC in your system. It may just mean you’re below the detection level.
Most drug tests screen for THC, rather than CBD. THC is the main component of marijuana. However, as we mentioned, CBD contains trace amounts of THC.
There isn’t a simple answer for how long CBD stays in your system. It depends on a number of factors, such as how it was administered, the dosage, and the frequency of use.
How Long Does CBD Stay In Your Hair?
Although blood tests are not nearly as common as urine tests for screening for CBD and cannabinoids, they can be used to detect THC metabolites. The reason they’re not the preferred method of drug screening is because of how quickly THC is eliminated from your bloodstream.
This can be particularly worrisome if you are searching for jobs or need to consent to drug screenings for other reasons (e.g., being on parole). It’s a common misconception that CBD and THC are the same; while CBD is a natural supplement, it’s still possible for the THC metabolites to be detected during drug screenings.
How Long Does CBD Stay In Your Urine?
According to the Mayo Clinic, THC metabolites can be detected for as long as 15 days post-administration among frequent and daily users. However, the research also suggests that these numbers can vary based on the dosage.
Generally, THC is only detectable in your plasma for about five hours after you take it. However, THC metabolites and, therefore, CBD can be present for up to a week.