CBD and hemp oil are both derived from the hemp (cannabis) plant. As discussed, strains of hemp were developed that contain less than 0.3% THC, and these are the source plants for CBD. The cannabis plants that are developed with less than 0.3% THC are called industrial hemp plants to differentiate them from the cannabis plants that produce marijuana.CBD is typically extracted from the flowers, leaves and stalks of the hemp plant. The cannabidiol extract is mixed with a carrier oil to improve bioavailability. CBD is fat-soluble, meaning the human body absorbs CBD better when taken with a fat-soluble substance. Typical carrier oils include MCT oil, coconut oil, olive oil, avocado oil, grape seed oil and hemp seed oil.Hemp oil is derived from the hemp plant's seeds and is primarily used as a food ingredient and dietary supplement. Hemp seed oil contains only a trace or no CBD but is rich in healthy fats, vitamins, and minerals.