Cod & Halibut Liver Oil
Updated Feb. 24th, 2025 | Read Time: 2 Minutes | What You Will Learn:
- Discover The Health Benefits of Cod & Halibut Liver Oil
- Key Nutrients Found in Cod & Halibut Liver Oil
- Cod & Halibut Liver Oil Supplement Varieties: Formats, Potency & More
- How To Take Halibut Liver Oil & Potential Contraindications
- Nutritional Information
- Reader Comments (4)
Cod and halibut liver oils have been used as nutritional supplements for many years. These liver oils decrease inflammation, and thereby, prevent and treat heart disease. A component of the liver oil, EPA, is an important fatty acid in the maintenance of cardiovascular health and the regulation of inflammation. EPA is a precursor to a series of chemicals whose job it is to regulate the inflammatory effects of arachidonic acid.
Discover The Health Benefits of Cod & Halibut Liver Oil
Arachidonic acid causes inflammation in arteries and leads to the development of atherosclerotic plaques. Syndrome X conditions such as obesity, hypertension, insulin resistance, adult-onset diabetes and stroke are helped by cod/halibut liver oil. Fish liver oils contain the vitamins D and K which improve bone health by regulating the uptake of minerals in the intestine and modulating bone building.
Thus fish liver oils may help prevent and reverse rickets in children and osteomalacia in adults. The essential fatty acid, DHA, in fish liver oils, is an essential component of the brain and central nervous system. It seems to concentrate in areas where there is lots of electrical activity, such as the synaptosomes, where nerve cells communicate, and the photoreceptors of the eye. This is why a deficiency of DHA can result in poor brain development, attention/deficit hyperactivity disorder, learning disorders, memory problems and poor visual development. Topically applied, cod/halibut liver oil contributes to faster wound healing and improvement in skin quality due to its vitamin A content.
Key Nutrients Found in Cod & Halibut Liver Oil
These oils contain more vitamin A and more vitamin D per unit weight than any other common food. In addition, they contain 7 percent each of the essential omega-3 fatty acids EPA and DHA, and small amounts of vitamin K. Some fish liver oil supplements are altered from their normal nutrient ratios to provide more or less of the above-mentioned nutrients. Children, and pregnant or nursing women, should use caution when using fish liver oils because of their fat-soluble vitamin content.
Cod & Halibut Liver Oil Supplement Varieties: Formats, Potency & More
Cod/halibut liver oil can be purchased as a liquid, flavoured liquid or soft gel capsule. All cod/halibut liver oil supplements in North America are tested for contaminants. Choose a reputable supplement because proper processing of the oil is important to prevent rancidity. Although it is not necessary, refrigerate liquid supplements and keep capsules away from heat to increase their shelf life.
How To Take Halibut Liver Oil & Potential Contraindications
The fat-soluble vitamins in fish liver oils are best absorbed with a meal that contains fat. Absorption of vitamins A, D and K is inhibited by some medications including antibiotics, antacids, steroids, laxatives, mineral oil and some cholesterol-lowering medications.




I grew up drinking cod liver oil and I can still remember how gross it tasted! I never understood why my mother always made me drink this stuff, but now after reading this article it all makes sense, thank you mom! I'm so thankful that there are capsule forms of taking this supplement now. Who knew that fish oil had so many great benefits! I can definitely appreciate the heart and mind health aspects. Good fish oil!
Hello,
Indeed, fish and flax oils offer a slew of health benefits with the omega's they offer. From skin to cognitive support, they're a great supplement to take daily. If you'd like to learn more about omega benefits, have a look at our articles on the various omegas:
https://www.nationalnutrition.ca/articles/supplements/omega-3-essential-fats/
https://www.nationalnutrition.ca/articles/supplements/omega-6/
https://www.nationalnutrition.ca/articles/supplements/supplement-articles-omega-7/
https://www.nationalnutrition.ca/articles/supplements/omega-9/
https://www.nationalnutrition.ca/articles/supplements/omega-3-6-9-blend/
Stay healthy & well!
Halibut and cod liver oil are generally low in mercury, so mercury toxicity is not really a risk here. However, as you mention, cod liver and halibut liver oil are both incredibly rich sources of vitamin A. While the vitamin A precursor found in plant-based foods such as carrots and sweet potatoes does not harbor a risk of toxicity, vitamin A from animal sources (retinol form) can be overdosed and cause toxicity if consumed in excess. So, this is something that one needs to be careful of. On that note, thank you for listing out the toxic vitamin A doses for adults, children, and pregnant women!
Hello Rachel,
We're glad you enjoyed this read. We agree, while learning the benefits of natural products, it's just as important to know of any potential side effects. Thank you for your comment and happy reading!