Traditionally, CBD oil is extracted using low heat and oil, but this cannot be done on a large scale and does not provide consistent, high-quality CBD. The two most common methods used by manufacturers to extract cannabis are ethanol extraction and supercritical carbon dioxide extraction (CO2). According to the Extraktab, ethanol extraction is substantially more expensive upfront than supercritical CO2 extraction, costing $4.71/lb for food-grade ethanol versus $0.04/lb for food-grade CO2, which is why CO2 extraction may be more popular with small-batch CBD manufacturers.