CBD, or cannabidiol, is quickly changing the debate surrounding the use of marijuana as a medicine. Most people have heard of a chemical called THC, which is the ingredient in marijuana that gets users high. But recently, attention has shifted to another compound in marijuana called CBD — and for good reason. Because while doctors can’t seem to look past certain side effects of THC, CBD doesn’t appear to present that problem. On the other hand, evidence of CBD’s medical benefits continues to grow.