CBD oil is made by extracting CBD from the cannabis plant, then diluting it with a carrier oil like coconut or hemp seed oil. It's gaining momentum in the health and wellness world, with some scientific studies confirming it may ease symptoms of ailments like chronic pain and anxiety.
This book goes into detail about the History of CBD traced to being used in Europe and China. Also explains the different routes that CBD can be taken. Vaped, CBD Oil, Gel Caps, Edibles, etc. Explains the dosages of mg/ml listed on packages.