Hemp seed oil is derived from hemp seeds - like the ones you put in your smoothies - and they're mainly used for dietary purposes. Think something similar to coconut oil. Refined hemp seed oil might also be found in beauty products, as it has been found to have emollient properties.  Hemp oil, what CBD oil is made from, is extracted from the buds of the hemp plant and has nothing to do with the seeds. The hemp buds are the part of the plant that contains the different cannabinoids that affect the human body.