By Dr. Sanjay Gupta, CNN Chief Medical Correspondent Updated 10:46 AM ET, Fri September 27, 2019 Play VideoWeed 5: The CBD Craze 02:02 (CNN)When we released “Weed” in 2013, few people had ever heard of cannabidiol, or CBD. Now, two-thirds of Americans are familiar with the compound, and 1 in 7 have tried it. Most of the…