CBD, or cannabidiol, is suddenly everywhere. In oils, creams, bath products -- even food and pet treats. But what is it? And will it end up being a big medical breakthrough or just the latest fad? CBD is the most abundant non-psychoactive compound found in marijuana and hemp. It’s different from THC, the compound that gives pot users a “high.” Epidiolex, the first drug containing CBD, was recently approved by the Food and Drug Administration to treat specific rare and severe forms of epilepsy.