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would cbd isolate flag on a drug test

Topical products that claim to contain CBD—like shampoos, cosmetics or creams—should not cause any reaction during a drug test because they do not enter the bloodstream. In the case of CBD oils, gummies, teas or transdermal patches, the situation is more complicated. In a test of 84 CBD products obtained online, 18 contained THC.

The legality of CBD products can be confusing. CBD products made from certain cannabis plant varieties are legal only in states where marijuana is legal, due to the potential THC content. CBD products made from hemp variety plants are legal throughout the United States as long as they contain less than 0.3% of THC and do not make any medical claims. (A hemp plant is defined as Cannabis sativa that contains less than 0.3% THC.)

Factors in CBD Oil Showing on Drug Screen

CBD products can still be problematic, however, when it comes to drug testing. Though drug tests screen for THC, not CBD, many CBD products contain a trace amount of THC which will be detected in your bloodstream during a drug test.

If you are concerned that THC in your CBD oil or other CBD product may show up on a drug test, you may be able to reduce the chance of that occurring, though there is no guarantee. Some of the factors that may increase the likelihood of a failed drug test are:

THC can be detected in a urine test for up to 15 days, depending on how often and how much you use. It leaves the bloodstream in about five hours, but substances your body makes from THC (THC metabolites) can show up for as long as 7 days. CBD tends to stay in the bloodstream from 2 to 5 days, depending on dosage and frequency. If you have been using CBD for a while, it can stay in your body for up to 30 days or more.

The chemical makeup of a plant depends on the strain and variety.

On the other hand, if full spectrum CBD is extracted from a hemp plant, it is legally required to contain 0.3% or less of THC.


It’s highly unlikely, but not impossible to get a positive drug test by inhaling second hand cannabis smoke. There is some evidence to suggest that second hand smoke from particularly potent cannabis in a poorly ventilated area might lead to a positive drug test result.

Aside from being extremely invasive, THC leaves the bloodstream after only five hours, although metabolites can be detected for up to seven days. In states with legal cannabis, the cutoff level for a blood test can be 1, 2 or 5 ng/ml. In states with no legalized cannabis, any amount over zero is considered to be a positive test result.

Hemp plants are a type of cannabis plant that contain many of the same properties as cannabis, but have only trace amounts of THC. If someone tried to get high from smoking or eating products made from hemp, it would not work.