With a fish allergy, is it safe to take an Omega-3 supplement (fish oil)? Posted on March 19, 2012 by SherryTorkos If you are allergic to fish then I would suggest choosing a non-fish source of omega-3 fatty acids such as micro algae or chia seed. You can also find supplements that contain vegetarian sources of DHA, which are made from yeast. Share this with your friends!