CBD is one of over 60 compounds found in cannabis that belong to a class of molecules called cannabinoids. Of these compounds, CBD and THC are usually present in the highest concentrations, and are the most recognized and studied in the cannabis industry today.
CBD and THC levels come among different plants. Marijuana grown for people that want to use it for recreational purposes often contains more THC than CBD so that they can get a head change.
But, by using breeding techniques, cannabis breeders have created varieties with a high ratio of CBD and next to zero of THC. These strains are very rare but have become more popular today.
Unlike THC, CBD does not cause a high (head change). While this makes CBD a poor choice for recreational users, it gives the chemical a significant advantage as a medicine, since health professionals prefer treatments with minimal side effects.
CBD is non-psychoactive because it does not act on the same pathways as THC. These pathways, called CB1 receptors, are highly concentrated in the brain and are responsible for the mind-altering effects of THC.