supercritical CO2 extracted oils in triglyceride form, manufactured exclusively for Douglas Laboratories. QÜELL Fish Oil is unique among other fish oils due to its supercritical extraction, purity, bioavailability and concentration. Supercritical CO2 extraction technology ensures that omega-3 fatty acids are extracted without high temperatures, oxygen or traditional chemical solvents. The result is a fish oil of exceptional purity that can deliver concentrated amounts of EPA and DHA in one serving. QÜELL Fish Oil EPA/DHA Plus D provides a 3:2 ratio of EPA to DHA plus 25 mcg (1,000 IU) of Vitamin D3 per softgel.