Food and beverage products containing CBD were introduced in the United States in 2017.[dubious – discuss] Hemp seed ingredients which do not naturally contain THC or CBD (but which may be contaminated with trace amounts on the outside during harvesting) were declared by the FDA as GRAS in December 2018. CBD itself has not been declared GRAS, and under U.S. federal law is illegal to sell as a food, dietary supplement, or animal feed. State laws vary considerably as non-medical cannabis and derived products have been legalized in some jurisdictions in the 2010s. cannabidiol oil
Cannabidiol can be taken into the body in multiple ways, including by inhalation of cannabis smoke or vapor, as an aerosol spray into the cheek, and by mouth. It may be supplied as CBD oil containing only CBD as the active ingredient (no included tetrahydrocannabinol [THC] or terpenes), a full-plant CBD-dominant hemp extract oil, capsules, dried cannabis, or as a prescription liquid solution. CBD does not have the same psychoactivity as THC, and may change the effects of THC on the body if both are present. As of 2018, the mechanism of action for its biological effects has not been determined.
^ Jump up to: a b Hoch, Eva; Niemann, Dominik; von Keller, Rupert; Schneider, Miriam; Friemel, Chris M.; Preuss, Ulrich W.; Hasan, Alkomiet; Pogarell, Oliver (January 31, 2019). "How effective and safe is medical cannabis as a treatment of mental disorders? A systematic review". European Archives of Psychiatry and Clinical Neuroscience. 269 (1): 87–105. doi:10.1007/s00406-019-00984-4. ISSN 0940-1334. PMC 6595000. PMID 30706168.