CBD is one of the compounds of the cannabis plant. There is no apparent psychoactivity from this substance. It is hard to find genuine CBD oil as THC is found in many of the oil products, vaping products, etc. There have also been reports of synthetic cannabinoids ("spice") in these oils/edibles. I can't speak to the effectiveness, some patients of mine swear by it, and I don't tell anyone to actively avoid it, I do tell them to keep marijuana products, especially oils, away from kiddos. I do warn them that it is possible that even though you think there is no THC in the oil, it's possible it's there. We have found it even it pts here in Oregon where it is legal, they have brought in the product and still tested positive. An eye opener sometimes. Just be careful. Also, I do tell patients...even snake venom is 100% natural and organic.