A new study published in JAMA shows that fish oil is beneficial to heart disease patients, protecting cellular DNA from damage. The study did not examine whether land-based omega-3s from walnuts and flax seeds might be similarly protective.
Of course, fish don’t actually produce omega-3s on their own, they get it by eating algae—and there are several vegan Omega 3 algae supplements on the market. While it stands to reason that algae-based omega-3 would exert the same protective effects as fish oil, without entailing fishery depletion and animal suffering, the study’s authors apparently didn’t bother to include algae supplements in their study. Link.