Extracted from the blossom of arnica montana standardized in Sunflower oil to give a predictable proportion of healing Sesquiterpene Lactones (SQLs). These are the ingredients that give Arnica its effects. CO2 extracted oils are best quality oils extracted using carbon dioxide in liquid form, as the solvent. When carbon dioxide is converted to liquid by using low temperatures and high pressure, it becomes a very safe and effective solvent that allows all the desirable active constituents of a plant to be collected without the risk of heat degradation. Once the extraction is complete, the carbon dioxide is allowed to go back to its natural gaseous state, leaving behind only the extracted essence of the plant. CO2 extracted oils are the closest representation of the natural plant ever achieved.