Omega-3 comes from algae, not from fish. Fish contain omega-3 because they eat algae. Unfortunately, that is not the only thing they contain nowadays. Fish are often full of PCBs and other toxins that need to be filtered out first. We extract omega-3 directly from algae in a pure, controlled process (In the United States). Most sources of omega-3 DHA and EPA supplements are not vegan and are therefore not suitable for vegetarians and vegans. For vegetarians and vegans, it is particularly important to take extra DHA and EPA because ALA can only be converted into DHA and EPA to a limited extent. Vegan Omega-3 based on algae oil is one of the few natural animal-free sources of the much-needed DHA and EPA..