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Can I take Cod liver oil and Garlic supplements together?

Drug interaction guide

Taking cod liver oil and garlic supplements together may increase your risk of bruising or bleeding. This is because both supplements have 'blood-thinning' properties. While the risk is generally low for healthy people, it becomes more significant if you are already taking prescription blood thinners or are planning to have surgery.

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Why this happens

Both cod liver oil (which contains omega-3 fatty acids) and garlic have antiplatelet effects. This means they both make the 'sticky' cells in your blood (platelets) less likely to clump together to form clots. When used together, this effect is added together, making it harder for your blood to clot if you get a cut or injury.

What you should do

For most people, taking these together in standard doses is fine, but you should watch for signs of easy bruising, nosebleeds, or bleeding gums. If you are scheduled for surgery or dental work, you should stop taking both supplements at least two weeks beforehand. If you are already taking prescription blood-thinning medication (like warfarin, aspirin, or clopidogrel), speak to your doctor before combining these supplements.

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Using other medicines

Taking 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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