CBD oil is manufactured by extracting CBD from the hemp flower and adding this extract to a carrier oil. CBD itself is not an oily substance, being more resin-like when extracted from hemp. In its raw form, CBD is not easy to take, so it is then added to a carrier oil such as MCT oil or hemp seed oil.
Once combined with a carrier oil, the resulting liquid is the gold, clear or green oil that we recognise as a CBD oil. In this form, CBD is far easier to dose and can be used straight out of the bottle (after a good shake). Flavourings can then also be added to make the oil more palatable for different users.