Fat
Cod liver oil
Cod liver oil is an oil made from the livers of cod. It supplies omega-3 fats along with vitamins A and D.
A teaspoon is not a universal dose
The Norwegian trial used an oil providing 10 micrograms of vitamin D, 250 micrograms of vitamin A and 1.2 g of long-chain omega-3s per 5 mL. These are the tested product’s amounts, not a recommendation or a specification for every bottle. 1