Does the ancient method employed by Rosita negatively affect the nutritional composition of the resultant cod liver oil?

The levels of nutrients (including fat-soluble vitamins A & D and fatty acids) present in the liver of a “living” wild codfish are not significantly different when compared to the oil obtained using the ancient methods employed by Rosita. And experiments have been performed to prove this. Nature dictates the nutrient levels in the Rosita oils, which is exactly how it was for their ancestors hundreds of years ago.