Faulty Interpretation of Cod Liver Oil Data
Your interpretation of folks getting liver damage from cod liver oil (referring to the page Cod Liver Oil Information) is misleading and actually wrong. the study mentions high levels of vitamin A being taken much more than one can get from a tablespoon of cod liver oil...
You did some really poor math here and set things up to prove a false point. The study you gave a link to, says that the smallest daily dose leading to the liver damage was 25,000 IU of Vitamin A (During 6 Years!).
There are 3000 IU of Vitamin A along with 1200 IU of vitamin D in a tablespoon of cod liver oil so one would have to ingest over 8 tablespoons of it daily to reach the smallest daily dose that lead to the liver damage in six years!
And you say: Furthermore, some studies believe that even moderate use of these preformed retinols may be contributing to liver damage. Some studies believe and may are weak words for your argument.
So, present a better argument against cod liver oil than the poor hysterical one you put together here.
This makes me wonder about the rest of your data...though I do agree that more Vitamin D is necessary but having it come from a whole food is preferable in the long and short run.