Unlike most fish oils that are extracted from the tissue of oily fish, cod liver oil is extracted directly from the liver of the cod fishwhich is rich in fat-soluble vitamins A and D as well as Omega 3- Fatty Acids. These essential vitamins and class of fatty acids each play an essential role in how they are stored in the body and aid in maintaining general overall health. With the powerful combination of black seed and cod liver oils this supplement is a great 2 in 1 for your everyday health and wellness needs.