is one of many cannabinoids (compounds) in the cannabis plant. Researchers have been looking at the possible therapeutic uses of CBD. Two of the compounds in marijuana are delta-9 tetrahydrocannabinol (THC) and CBD. These compounds have different effects. Until recently, THC was the best-known compound in cannabis. It is the most active constituent, and it has a psychological effect. It creates a mind-altering “high” when a person smokes it or uses it in cooking. This is because THC breaks down when a person applies heat and introduces it into the body.