Pharmax insisted that this product be tested much more stringently than necessary to demonstrate its premium level of purity and safety. In a battery of 10 tests conducted by IFOS, Pharmax Finest Pure Fish Oil proved itself as a premium product. Results of these tests conclude: This product shows absolutely no evidence of mercury, arsenic, cadmium, lead or nickel The Council for Responsible Nutrition's allowable maximum of PCBs is .09 of 1 part per million. This product tested at .000338 of 1 part per million This product exceeds the label claim for omega-3 content. Pharmax Finest Pure Fish Oil contains high concentrations of EPA and DHA, flavored with essential oil of orange, and has virtually no fish oil odor or taste.