Weed-infused cookies, brownies, and candies — called edibles — have also gained some popularity among recreational users. There’s even a prescription medication that contains THC, called dronabinol, and is sold as Marinol in the U.S.

But Dr. Sanjay Gupta, a leading neurosurgeon and chief medical correspondent for CNN, says that, medically speaking, these are not the optimal ways to consume cannabis.

Dr. Gupta recently released a documentary, “WEED,” exploring the benefits of medical marijuana and its general effects on our brains and bodies.

Learn about the advantages and disadvantages of the different ways of consuming marijuana.

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