The Supercritical CO2 extraction process uses a harmless, natural gas, under low heat thresholds and highly compressed. This compressed gas has the density of a liquid, but is able to penetrate deeply into the material and dissolve the toxins bound to the fat oils. The pressure is then carefully released and the gas harmlessly dissipates into the atmosphere. Low temperature, oxygen-free processing prevents oxidation reactions.Due to this innovative process of supercritical CO2 extraction our fish oil concentrate undergoes, levels of contaminants fall well below established safe limits, often containing levels completely undetectable through very rigorous analysis. This technique uses extremely minimal quantities of heat in contrast to the more common molecular and steam distillation, thereby sparing the oil from the damaging, oxidizing effects of heat stress. Supercritical CO2 extraction processing is frankly, expensive. However we feel it is well worth it to once and for all have a truly clean, safe and pure, final product.