Pure fish oil dietary supplements are an effectual way to get the vital omega-3 essential fatty acids that you would typically get from eating fish. Be very cautious in choosing a specific supplement. Look closely to be sure you are getting a capsule that has DHA and EPA in it as these are so critical to heart and brain health as mentioned above. Another important factor to look for is if that product has been molecularly distilled to guarantee you pure fish oil free from all contaminants.