Molecularly Distilled Odor Controlled - Enteric Coated 180 EPA / 120 DHA Supports Heart Health This natural fish oil concentrate is manufactured under strict quality control standards. It is tested to be free of potentially harmful levels of contaminants such as PCBs, dioxins, mercury and other heavy metals. Those who experience nausea or reflux from other fish oils should find this enteric-coated, odor-controlled softgel easier to tolerate.