Natures Aid Cod Liver Oil provides Omega-3 fatty acids EPA and DHA which contribute to the normal function of the heart. Cod Liver Oil is an excellent source of Vitamins A and D which contribute to the normal function of the immune system. Vitamin D also contributes to the maintenance of normal teeth, bones and muscle function, whilst Vitamin A contributes to the maintenance of normal skin and vision. Natures Aid Cod Liver Oil has been molecularly distilled to remove pollutants such as heavy metals (including mercury), dioxins and PCBs to ensure ultimate purity. About Natures Aid Natures Aid have been manufacturing and supplying quality nutritional supplements to the independent retailers for 30 years. Their Philosophy has always been to provide high quality, effective nutritional supplements to help preserve and maintain optimum health. Natures Aid Cod Liver Oil provides Omega-3 fatty acids EPA and DHA which contribute to the normal function of the heart.