1. CO2 extraction In this particular extraction approach, the hemp is subjected to high-pressure, small-temperature CO2 fuel, which helps isolate and maintain the cannabinoids while in the oil. The one downsides are gradual extraction time and high production costs, which means these products is usually over the expensive side. http://hempcoresearch7.blogdal.com/1278262/not-known-factual-statements-about-cbd-hemp-oil-tincture-300mg