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Can I take Iron supplements and Vitamin d together?

Drug interaction guide

There is no known harmful interaction between iron supplements and vitamin D. In fact, they are often taken together safely.

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Why this happens

Iron and vitamin D use different pathways for absorption and processing in the body. Vitamin D is fat-soluble and absorbed in the small intestine with dietary fats, while iron is a mineral absorbed through specific transporters in the gut lining. They do not compete for the same 'gateways' into the bloodstream.

What you should do

You can take iron and vitamin D at the same time. However, be mindful that iron is best absorbed on an empty stomach or with vitamin C (like a glass of orange juice), whereas vitamin D is best absorbed when taken with a meal containing some fat (like yoghurt, eggs, or avocado). To get the most benefit from both, you might choose to take them with your largest meal of the day.

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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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