Codliveroil is an animal, fat containing oil from the liver of fish. Often codfish is used to produce this. To detract oil from the livers, there are two methods available. This is heating and fermentation. Both processes result in codliveroil, but they are completely different.
Which one to choose? Reglar (heated) codliveroil, or fermented codliveroil? We explain all about it in our article: Fermented codliveroil or reguler (heated) codliveroil?