Benefits of Healthvit Cod liver oil Cod Liver Oil is a fish oil supplement rich in certain nutrients such as Vitamins A and D-3. It also contains -3 Fatty Acids| specifically EPA (Eicosapentaenoic Acid) and DHA (Docosahexaenoic Acid)| which have been shown to support overall health. Our Cod Liver Oil is tested to be free of potentially harmful levels of contaminants (i.e. mercury| heavy metals| PCB’s| dioxins| and other contaminants). This double strength Cod Liver Oil contains twice the Vitamins A and D-3 as in our regular strength Cod Liver Oil softgels.