Nora Volkow, the director of the National Institute on Drug Abuse (NIDA), said that regulating cannabis products is "crucial," to address the pace of states' adoption of both medical and recreational use of cannabis.

"I think that is crucial because, as you know, the majority of the states in the United States have legalized either recreational or medical marijuana," Volkow told Fox News on Wednesday.

In order to keep up with the rising trend, having a greater understanding of what can be done to "minimize harmful effects" is a priority, the top federal health official said.

"That …

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