Can I take Iron supplements and Vitamin D together?

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.

Important precautions

Accidental overdose in children

Iron supplements are a leading cause of fatal poisoning in children. You must store this medicine in a secure place out of the reach and sight of children.

Hypercalcaemia (high blood calcium levels)

Do not take vitamin D supplements if you have high levels of calcium in your blood or urine, as this can lead to serious kidney damage and heart rhythm problems.

Food and drink warnings

Alcohol

It is best to avoid or strictly limit alcohol when taking iron supplements. Chronic alcohol consumption can interfere with how iron is stored and processed in the liver, potentially increasing the risk of iron toxicity or liver strain.

Tea, Coffee, and Caffeine

Caffeine and tannins found in tea and coffee significantly reduce the amount of iron your body absorbs. You should avoid drinking these for at least 2 hours before or after taking your iron supplement.

Dairy products (Milk, Cheese, Yoghurt)

Calcium in dairy products prevents iron from being absorbed properly. Avoid consuming dairy for at least 2 hours before or after your dose.

Eggs and Whole Grains

Compounds in eggs (phosphoprotein) and whole grains (phytates) can interfere with iron absorption. It is best to take iron on an empty stomach, at least 1 hour before or 2 hours after meals.

Vitamin C (Orange Juice)

Taking your iron supplement with a glass of orange juice or foods rich in Vitamin C is beneficial, as it helps your body absorb the iron more effectively.

High-fat meals

Vitamin D is a fat-soluble vitamin. This means it is absorbed much more effectively by your body when taken with a meal that contains some fat (such as avocado, nuts, or olive oil).

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.