The outgoing head of the Food and Drug Administration (FDA) suggested on Tuesday that it would take several years for the agency to come up with rules around allowing hemp-derived cannabidiol (CBD) in food products—unless Congress steps in. At a Brookings Institution event, FDA Commissioner Scott Gottlieb recognized that there’s strong interest among the cannabis industry and lawmakers in developing a regulatory framework through which CBD from hemp could be extracted, sold and introduced into the food supply. The problem is that “CBD didn’t previously exist in the food supply, and it exists as a drug under the statute.”“It can’t just be put into the food supply,” he said, arguing that current law only allows the FDA to “contemplate putting a drug that wasn’t previously in the food supply into the food supply if it goes through a rulemaking process.”