While most people assume CBD doesn’t contain THC, there are still trace amounts found in CBD oil that is made using the entire hemp plant. This is known as full-spectrum CBD and can be sold legally as long as it contains less than 0.3% THC. While this minuscule amount typically isn’t enough for people to feel any psychoactive effects, it can still show up in a person’s system.
In September 2018, following its approval by the FDA for rare types of childhood epilepsy, Epidiolex was rescheduled (by the Drug Enforcement Administration) as a Schedule V drug to allow for its prescription use. This change applies only to FDA-approved products containing no more than 0.1 percent THC. This allows GW Pharmaceuticals to sell Epidiolex, but it does not apply broadly and all other CBD-containing products remain Schedule I drugs. Epidiolex still requires rescheduling in some states before it can be prescribed in those states.
The wide range of benefits contained in full-spectrum CBD extracts means some CBD merchants have either ceased to sell, or scale down the promotion of CBD isolate, in comparison to the whole-plant extract variety. Companies and individuals who extract CBD themselves are realising that cannabis has more to offer medicinally than just CBD or THC, and that there is little to no reason to not include all that this "super-plant" has to offer in the extraction process.
Third-party testing: Once a CBD oil is manufactured, CBD oil companies will often submit their products for third-party tests, which are conducted by non-company personnel to ensure the product is safe for public consumption and meets quality standards.CBD oils should always be accompanied with information about third-party tests; best practice is to avoid oils that do not supply these details.