Can I take Cod liver oil and Magnesium together?
Drug interaction guide
Originally published 14 Mar 2026
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There is no known harmful interaction between cod liver oil and magnesium supplements. In fact, they are often taken together as part of a balanced supplement routine.
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Why this happens
Cod liver oil is a source of fat-soluble vitamins (A and D) and omega-3 fatty acids, while magnesium is a mineral. They are absorbed through different pathways in the digestive system and do not interfere with how the body processes or eliminates the other.
What you should do
Back to contentsIt is safe to take these together. For the best absorption, take your cod liver oil with a meal containing some fat. Magnesium can be taken with or without food, though taking it with a meal may reduce the risk of an upset stomach or diarrhoea. Always stick to the recommended daily dose on the product packaging.
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Using other medicines
Back to contentsTaking multiple medicines? Our Medicines Interaction Checker helps you check whether your prescriptions, over-the-counter medicines, and supplements are safe to take together. Simply search for your medicines to see potential interactions and what to do about them.
Disclaimer
This information is for general educational purposes only and should not be relied upon as a substitute for professional medical advice. Always consult your GP, pharmacist, or another qualified healthcare professional before making decisions about your medications. Individual circumstances may vary, and only a healthcare professional who knows your medical history can provide personalised guidance.
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Article history
The information on this page is written and peer reviewed by qualified clinicians.
14 Mar 2026 | Originally published
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