I take the omega-3 supplements from Nordic Naturals, and don't have any of the fishy burps or other undesirable side effects.
For the record, I have done a bit of research on omega-3 supplements, and the FDA already allows some qualified health claims about them. One of the issues seems to be that, unless we eat a lot of fish, algae, or flax seeds, we simply don't get enough. Omega-3s were once more common in our diet than they are now. So they are definitely worth looking into.
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