From the deep, unpolluted waters near Norway, Carlson bring you the finest cod liver oil which is naturally rich in vitamin A, Vitamin D3, EPA and DHA. Only cod fish caught during the winter and early spring are used, as the liver oil content is highest at this time of year. The oil is separated from the liver tissues without the use of chemicals. Super 1000mg provides 300% more cod liver oil than other soft gels. THIS PRODUCT is regularly tested (using AOAC international protocols) for freshness, potency and purity by an independent, and has been determined to be fresh, fully potent and free of detectable levels of mercury, cadmium, lead, PCB's and 28 other contaminants. Fish provides the important polyunsaturated omega 3's, EPA and DHA, which aid our well being by promoting cardiovascular health. For those individuals who do not eat an oily fish diet, Carlson offers a variety of Fish oil products in Liquids that are very tasty. All fish oil products are regularly tested using AOAC international protocols for potency and purity by and independent Registered laboratory.