Full spectrum CBD oil is the hemp oil that is initially extracted from the plant, containing all the cannabinoids, terpenes, flavonoids, and healthy fatty acids. This includes tiny trace amounts of THC. Some prefer not to use a CBD oil product that contains any THC, and so when detectable levels of THC are filtered out, the resulting oil is called broad spectrum CBD oil. CBD isolate is CBD with all other plant matter removed, leaving behind only 99% pure CBD.