Recently, my teenage son and I had lunch at a well-known restaurant in Los Angeles. As we waited for our breakfast to arrive, I noticed a sign on the table. “Put CBD in your coffee!” was in bold red letters. I realized as I sipped my coffee that, although CBD oils and products seem to be everywhere these days, I knew very little about them. Most people are familiar with the more well-known compound tetrahydrocannabidol, or THC, which is the part of the cannabis plant that causes the psychotropic “high” when smoked or ingested. CBD is different in that it is not mind-altering, yet, according to...