Cod liver oil has been used as a food oil in northern Europe for generations. As the name suggests, it is obtained from the liver of cod rather than from the body tissues used to produce many conventional fish oils.
Cod liver oil vs fish oil
Both are marine oils, but they are sourced differently. Standard fish oils are commonly produced from the tissues of oily fish, while cod liver oil is produced from cod livers. Their naturally occurring nutrient profiles can differ, so compare the actual label rather than assuming the products are interchangeable.
How is it produced?
Production methods vary by manufacturer. Useful details include fish species, harvest location, extraction method, processing temperature, oxidation controls, added ingredients and packaging.
Liquid or capsules?
Liquid oil makes it easy to measure a larger serving but has a distinctive flavour. Capsules are convenient and portable but contain a smaller quantity per capsule. Compare serving size rather than container size.
What should you check?
Look for the amount of oil per serving, naturally occurring omega-3 content where stated, vitamin content where stated, added ingredients, storage instructions, origin and testing information.
