Taking Iron Supplements? Here’s How to Get the Most Out of Them
Iron supplements can be an important part of treating or preventing iron deficiency and anaemia. But how you take your iron matters. Taking it incorrectly can reduce how much iron your body absorbs—or leave you dealing with unnecessary side effects such as nausea, constipation and stomach discomfort.
Here’s what you should know to make your iron supplement work better for you.
1. Take iron on an empty stomach when possible
Iron is generally absorbed best when taken on an empty stomach. For example, you can take it about 1 hour before or 2 hours after a meal.
However, if taking iron on an empty stomach causes nausea or stomach pain, you can take it with a small amount of food. You may absorb slightly less iron, but taking it consistently is more important.
2. Take it with vitamin C
Vitamin C can help improve the absorption of iron. You can take your supplement with a glass of water and have it alongside a source of vitamin C, such as an orange, guava, kiwi, strawberries or other vitamin-C-rich foods.
You don’t necessarily need a separate vitamin C supplement unless your healthcare provider recommends one.
3. Be careful what you take with your iron
Some foods, drinks and medications can interfere with iron absorption.
Try not to take your iron supplement at the same time as:
- Tea and coffee – including some herbal teas
- Milk and other calcium-rich foods or supplements
- Calcium supplements
- Antacids and some medicines used to reduce stomach acid
- Certain medications, including some antibiotics and thyroid medicines
If you take other medicines or supplements, ask your doctor or pharmacist how much time you should leave between them and your iron supplement.
4. Don’t take more iron than prescribed
More iron isn’t necessarily better.
Taking excessive amounts of iron can cause serious side effects and, in some circumstances, iron toxicity. Your healthcare provider may recommend a specific dose depending on your iron levels, haemoglobin, age, pregnancy status and the underlying cause of your deficiency.
Avoid self-prescribing high-dose iron simply because you feel tired. Fatigue can have many causes, and taking iron when you don’t need it may be harmful.
5. Know that constipation and dark stools can happen
Iron supplements commonly cause side effects such as:
- Constipation
- Nausea
- Stomach discomfort
- Bloating
- Dark or black stools
Dark stools are often a normal effect of taking iron. However, black, tarry stools, blood in your stool, severe abdominal pain or persistent vomiting should not automatically be blamed on iron. Seek medical advice if these occur.
If constipation or nausea becomes difficult to manage, don’t simply stop your treatment. Speak to your healthcare provider. They may adjust the dose, timing or type of iron you are taking.
6. Be consistent with your treatment
Iron deficiency usually doesn’t correct overnight. Even when you start feeling better, your body may still need time to rebuild its iron stores.
Take your supplement according to the schedule given by your healthcare provider and attend any recommended follow-up blood tests. Your doctor may use tests such as haemoglobin and ferritin to assess your response to treatment.
7. Keep iron supplements safely away from children
Iron tablets can be extremely dangerous if accidentally swallowed by young children. Store them securely and out of children’s reach.
When should you see a doctor?
If you are experiencing persistent tiredness, weakness, dizziness, headaches, shortness of breath, pale skin, or unusually heavy menstrual bleeding, don’t assume that you simply need an iron supplement.
A healthcare professional can assess your symptoms and, where appropriate, perform blood tests to determine whether you have iron deficiency or anaemia and investigate the underlying cause.
The goal isn’t just to increase your iron—it is to understand why your iron is low in the first place.
Take your iron the right way. Treat the cause, not just the symptoms.
At Calgary Healthcare, our team can help assess symptoms of iron deficiency and anaemia, arrange appropriate laboratory investigations, and guide you on the right treatment for your individual needs.
Book an appointment today and get the right advice for your health.
