Could you be getting PCB's with your fish oil?
Check out this lawsuit against 8 manufacturers of omega 3 from fish oil.
Seems that there are fish oil companies that claim that their products do NOT contain PCB's (polychlorinated biphenyl compounds, ). Also seems that there were PCB's found in their products. Now they are being sued for not telling the truth. Among the companies being sued: GNC, Solgar, CVS, Rite Aid.
All the more reason to take Marvalous Omega 3 from Sage.