Cannabinoids are also thought to be produced mainly by the cannabis plant, though researchers have been exploring other plants and fungi that may produce similar compounds. Both psychoactive marijuana and hemp plants can produce these compounds. Plants cultivated for human consumption, however, tend to produce more cannabinoids than hemp plants grown for fiber or seed. Dr. Klein points to the legalization of marijuana in many places, which has triggered interest in potential health benefits of marijuana-related products. “We are likely to see continued interest in CBD and an increase in research about its uses and efficacy in the coming years,” he says.