Cannabidiol is a phytocannabinoid discovered in 1940. CBD oil is made by extracting CBD from the cannabis plant, then diluting it with a carrier oil like coconut or hemp seed oil. Cannabidiol (CBD) oil is a product that's derived from cannabis. Cannabidiol (CBD) is an active ingredient in cannabis derived from the hemp. Learn more about Cannabidiol (Cbd) uses, effectiveness, possible side effects, interactions, dosage, user ratings and products that contain Cannabidiol (Cbd). Cannabidiol (CBD) oil comes from the Cannabis plant and has become a popular alternative therapy for a range of conditions over the past few years.