EVERY batch of our marine oil concentrates is assayed by one of the top independent testing labs in the world (Eurofins). Testing every batch of concentrated oil prior to bottling or encapsulation is highly unusual and Metagenics may be the only professional nutraceutical company to practice this added safety measure. Checks for numerous contaminants are conducted, including pesticides, heavy metals, dixins, furans, and markers of PCBs.