The endocannabinoid system is a complex, endogenous system of cell communication. It is made up of cannabinoid receptors and proteins that are responsible for its transport throughout our bodies.
This means that, within each of us, there are receptors ready to recognize cannabinoids and to react to them. The main cannabinoid receptors are the CB1 and CB2 receptors.
CB1 receptors, in particular, are believed to be of central importance to the regions of the brain that control memory and movement, whereas CB2 receptors have been studied for their impact on our immune system.
Given the positioning of these receptors, it is thought that the endocannabinoid system is involved in a great many physiological processes, including motor control, memory and learning and the perception of pain.
In other words, CBD is in no way a foreign substance for our body.