Cannabidiol has low affinity for the cannabinoid CB1 and CB2 receptors,[25][26] although it can act as an antagonist of CB1/CB2 agonists despite this low affinity.[26] Cannabidiol may be an antagonist of GPR55, a G protein-coupled receptor and putative cannabinoid receptor that is expressed in the caudate nucleus and putamen in the brain.[27] It also may act as an inverse agonist of GPR3, GPR6, and GPR12.[28] CBD has been shown to act as a serotonin 5-HT1A receptor partial agonist.[29] It is an allosteric modulator of the μ- and δ-opioid receptors as well.[30] The pharmacological effects of CBD may involve PPARγ agonism and intracellular calcium release.[7]
Is CBD Legal? Marijuana-derived CBD products are illegal on the federal level, but are legal under some state laws. Hemp-derived CBD products (with less than 0.3 percent THC) are legal on the federal level, but are still illegal under some state laws. Check your state's laws and those of anywhere you travel. Keep in mind that nonprescription CBD products are not FDA-approved, and may be inaccurately labeled.

Hemp-producing cannabis has tall, fibrous stalks that are very strong and have very few flowering buds. On the other hand, marijuana strains are short, bushy, and have high amounts of THC. In fact, industrial hemp and medical marijuana are so distinctively different that most lay people wouldn’t be able to tell that they belong to the same genus of plants if they encountered them in the wild! cannabidiol oil