Cod liver oil is well-known for its naturally occurring omega-3 fatty acids, EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid), and has a long history of traditional use for the support of overall health and well-being.* NOW® Cod Liver Oil is also rich in vitamins A and D-3. The natural cod liver oil used in this softgel is manufactured under strict quality control standards. It is tested to be free of potentially harmful levels of contaminants (i.e. mercury, heavy metals, PCBs, dioxins, and other contaminants). Natural color variation may occur in this product.