Eicosapentaenoic acid (EPA) is a rich source of long-chain omega-3 fatty acids and is present in high quantities in cold water fish. Oils prepared from such fish as sardines, anchovies and mackerel are also rich in docosahexaenoic acid (DHA), an omega-3 fatty acid. Both of these fatty acids are important for maintaining the fluidity and function of cell membranes, particularly in the retina and the brain.* Super EPA is prepared from molecularly distilled fish oils. Each batch is tested to insure purity and the absence of heavy metals and other contaminants.