Optimum fish oil is a natural supplement filled with Omega-3 essential fatty acids. Fatty acids are the basis of fats and oils, and, despite popular belief, are necessary for overall health. These fatty acids are termed "essential" because your body cannot manufacture them by itself. EFA's must come from food or supplemental sources. They are also essential because they are a component of every living cell in the body, and are necessary for rebuilding existing cells and the production of new cells. Studies suggest fish oil supports healthy heart function and joint flexibility. Fish Oils contain long-chain fatty acids, with equally long names like docosahexenoic acid (DHA) and eicosapentaenoic acid (EPA). DHA and EPA are essential fats that cannot be made by your body. So, consuming them through foods like salmon and supplements such as the ON Fish Oil Soft gels is the only way to get DHA and EPA. Better yet, our Fish Oil Soft gels are enteric coated, which means that you get all of the benefits of fish oils without the fishy aftertaste that you might encounter without this special coating.