CBD is one of over a hundred cannabinoids found in marijuana. The most familiar cannabinoid is THC or "delta-9-THC" if you want to get fancy. It’s the psychoactive element that gives marijuana it’s "high". CBD, on the other hand can actually counter-act THC – good to know if you over do it and get “too high”! CBD can lay the smack down to many medical ailments, from inflammation to killing cancer cells.
Research is still being carried out on CBD, but initial studies show it to be hugely beneficial to patients experiencing many different ailments and conditions.