Cod Liver Oil - Miracle Cure or Not?

Cod liver oil seems to be promoted as the the top natural cure and disease-prevention miracle fountain of youth. Whenever I hear about it I hear nothing but awesome things.

Some reports say there is too much vitamin A and traces of PCB in cod liver oil and will recommend other fish oils instead. After doing a bit of research I think I am confused.

I would like to get back to the cod liver oil. I have been taking fish oil pills from GNC on a daily basis. Too much of anything is bad I guess.

When I read about the benefits of cod liver oil and then about the disadvantages from others I feel like Dr. Jekyll/Mr. Hyde.