Harp Seal Oil is recognized as the best source of Omega-3 Fatty Acids, as it not only contains EPA and DHA but also DPA. About a third of the long-chain Omega-3 fatty acids circulating in the human blood is the result of DPA, which are the most important of the essential fatty acid family in maintaining soft, plaque-free arterial walls. Harp sealåÊoil is also more stable than fish oil, and less vulnerable to the natural process of oxidation.