A cannabinoid is one of a class of diverse chemical compounds that acts on cannabinoid receptors, also known as the endocannabinoid systemThe endocannabinoid system (ECS) is a biological system composed of endocannabinoids, which are endogenous lipid-based r... More in cells that alter neurotransmitter release in the brain. Ligands for these receptor proteins include the endocannabinoidsEndocannabinoids are substances produced from within the body that activate cannabinoid receptors. After the discovery o... More produced naturally in the body by animals; phytocannabinoids, found in cannabisCannabis (/ˈkænəbɪs/) is a genus of flowering plants in the family Cannabaceae. The number of species within the gen... More; and synthetic cannabinoids, manufactured artificially. The most notable cannabinoid is the phytocannabinoid tetrahydrocannabinol (THCTHC, or Tetrahydrocaannabinol, is the chemical responsible for most of the marijuana’s psychoactive effects. It behave... More), the primary psychoactive compound in cannabis.[1][2] Cannabidiol (CBD)Cannabidiol (CBD) is a phytocannabinoid discovered in 1940. It is one of 113 identified cannabinoids in cannabis plants ... More is another major constituent of the plant.[3] There are at least 113 different cannabinoids isolated from cannabis, exhibiting varied effects.[4]