Can I take Fish oil and Vitamin d together?
Drug interaction guide
Originally published 25 Jan 2026
Meets Patient’s editorial guidelines
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There is no negative interaction between fish oil and vitamin D. In fact, taking them together is often beneficial. Vitamin D is a fat-soluble vitamin, meaning it needs fat to be absorbed properly by your body. The healthy fats (omega-3 fatty acids) in fish oil can actually help your body absorb the vitamin D more effectively.
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Why this happens
Vitamin D requires dietary fat for optimal absorption in the small intestine. Fish oil provides a concentrated source of lipids that facilitates the formation of micelles, which are necessary for the transport of vitamin D into the bloodstream.
What you should do
Back to contentsIt is perfectly safe and often recommended to take these two supplements together. For the best results, take them with your largest meal of the day to further aid absorption.
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Important precautions
Back to contentsBleeding disorders or use of blood-thinning medication (e.g. warfarin)
High doses of fish oil can have an antiplatelet effect, which may increase your risk of bleeding or bruising if you already take blood thinners or have a bleeding disorder.
Food and drink warnings
Back to contentsHigh-fat meals
Both Vitamin D and Fish Oil are fat-soluble. Taking them with a meal that contains some fat (such as yoghurt, eggs, or avocado) significantly improves how well your body absorbs the supplements.
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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.
25 Jan 2026 | Originally published
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