Cannabidiol (CBD) is one of the main compounds derived from the cannabis plant and is used for its medicinal properties as part of medicinal cannabis preparations. Oil-based CBD products are also available over the counter as wellness products. CBD oils prescribed for a medical condition from a specialist doctor typically have higher concentrations of CBD than those available on the high street. CBD oil available on the high street is classified as a novel food and therefore does not have to meet the same stringent regulations regarding its manufacture as medicinal preparations.