What Is Fish Oil? Fish oil is the extracted oil of certain types of fish such as tuna, mackerel, salmon, halibut, and cod. Fish oil is high in Omega-3 fatty acids. Fish Oil supplements have been augmented by Vitamin E in order to ensure that they remain preserved. Fish Oil is the only source of Omega-3 fatty acids which is bioavailable. Fish Oil Benefits † There are many reasons why fish oil is one of the most popular dietary supplements! From its heart-supporting benefits to helping keep skin beautiful and healthy to joint support, this multi-use supplement is a great choice for anyone looking to boost their health all-around. Contributes to healthy blood pressure & cholesterol Promotes a healthy mood Helps maintain a healthy weight Promotes muscle growth Support healthy mood Anti-inflammatory properties