For decades scientists thought that CBD attached to receptors in the brain.
Now scientists point to research showing that CB1 receptors in the brain dealing with coordination, pain, emotions, appetite and more are “encouraged” by CBD to create more of the body’s own cannabinoids
The following study published in Pubmed.gov looks at 30 years of investigation: https://www.ncbi.nlm.nih.gov/pubmed/22716160