A 2017 study found that about 7 out of 10 CBD (cannabidiol) products did not contain the amount of cannabidiol stated on the label and about 1 in 5 contained THC (tetrahydrocannabinol). Doses aren’t standardized across brands and some recommend higher doses than others. In addition, hemp-derived CBD oils aren’t FDA regulated and the advertised THC levels of products can be unreliable. As a result of varying dose recommendations and uncertain THC levels, taking CBD oil comes with a risk of a non-negative test result. Because CBD oil is unregulated you can never be 100% sure what you’re getting in your product.
Several companies have been reported providing “low THC” CBD oil, but when the product is tested it is not low in THC. If the product contains THC, even hemp-based products that are low THC, then marijuana can remain in your system. Detection windows for THC can vary on several factors, including a person’s weight and frequent use. Marijuana can show positive on a urinalysis for 30 days.
CBD oil extracted from hemp is not supposed to have any more than .3 percent of THC. However, it’s not uncommon for sellers to mislabel their products as THC-free hemp when in reality, it’s a low-quality oil extracted from marijuana, which does contain THC. One study discovered that almost 70 percent of the CBD products sold online were not labeled properly, causing potential serious harm to its consumers.
The reason for this widespread mislabeling is that CBD products are not strictly regulated by the FDA. DOT testing does not check for CBD compound, but it does check for THC. CBD is considered a supplement and it’s unregulated, so you really don’t know what amount of THC the products contain. The DOT testing has no way of determining if the THC failure was from drug use or supplement use.