What is Cod Liver Oil? Cod Liver Oil capsules are specially formulated, with carefully chosen Cod Liver Oil to provide a potent source of the important Omega-3 nutrients EPA & DHA. It is a natural source of Vitamins A & D. What Does Cod Liver Oil Do? May help to maintain healthy skin, hair, teeth & gums May help to maintain healthy bones & joints May help to support a healthy immune system May help to maintain a healthy cardiovascular system May help to maintain normal mood & a healthy nervous system DHA & EPA contribute to the maintenance of normal blood pressure & normal triglyceride concentrations.