[ahn]

Do you get the oil by sucking on an actual cod liver?

Note that regular unrefined cod liver oil is very high in vitamin A, so you can kill yourself by drinking enough of it(see hypervitaminosis A). Vitamin A pills contain trivial amounts though(to stop people from killing themselves I am told), so the cod liver oil is a nice way to go if you feel that you need to supplement for some reason. And of course you also get the D, some nice fatty acids, and maybe a little mercury too.

[gamache]

Cod has minimal mercury. The fish with methylmercury issues tend to be large fish which live many years.

Data: http://www.fda.gov/food/foodsafety/product-specificinformati...