Who should not take cod liver oil?
John Johnson
Updated on May 14, 2026
Do not take cod liver oil that provides more than about 3000 mcg of vitamin A and 100 mcg of vitamin D when pregnant or breast-feeding. Children: Cod liver oil is likely safe for most children when taken by mouth in amounts that provide no more than the recommended daily intakes of vitamin A and vitamin D.
Can taking cod liver oil be harmful?
Summary Certain types of omega-3 fatty acid supplements, such as cod liver oil, are high in vitamin A, which can be toxic in large amounts.Is cod liver oil good for everyone?
Cod liver oil is a good source of the omega-3 fatty acid known as docosahexaenoic acid (DHA). Studies have shown that DHA improves cognitive function and can protect against Alzheimer's disease and dementia.Can you take cod liver oil with high blood pressure?
Reducing triglycerides: Omega-3 fatty acids in cod liver oil may reduce blood triglycerides by 15–30% ( 36 , 37 , 38 ). Lowering blood pressure: Many studies have found that omega-3 fatty acids may lower blood pressure, especially in people with high blood pressure and high cholesterol ( 2 , 39 ).Does cod liver oil interact with any medications?
Taking cod liver oil along with medications that lower blood pressure might cause blood pressure to go too low. Monitor your blood pressure closely. Cod liver oil might slow blood clotting. Taking cod liver oil along with medications that also slow blood clotting might increase the risk of bruising and bleeding.Cod Liver Oil vs. Fish Oil: Is there a Difference?
When should you not take cod liver oil?
Cod liver oil is possibly unsafe when taken in larger amounts. Do not take cod liver oil that provides more than about 3000 mcg of vitamin A and 100 mcg of vitamin D when pregnant or breast-feeding.Who should not take fish oil?
New research finds that taking omega-3 supplements is associated with an increased risk of atrial fibrillation in people with a high risk of, or existing, heart disease.What supplements to avoid if you have high blood pressure?
Examples of herbal supplements that can affect your blood pressure or blood pressure medications include:
- Arnica (Arnica montana)
- Ephedra (ma-huang)
- Ginseng (Panax quinquefolius and Panax ginseng)
- Guarana (Paullinia cupana)
- Licorice (Glycyrrhiza glabra)