By Dr Pranab Gyawali, Consultant Gastroenterologist
Published: | Updated:
Quick answers
Persistent fatigue can have many causes. Low iron is one possibility, but it is not the only explanation.
You do not need to know that your iron is low before asking for medical advice about continuing fatigue. The first step is to understand the symptoms, review any previous blood results and decide which tests may be useful.
Fatigue is one of the most common problems Dr Pranab Gyawali sees in clinic. He has assessed patients with persistent tiredness for over 25 years, both in London and Dubai.
Who is this assessment for? People who remain tired despite adequate sleep, have reduced energy or concentration, or feel that something more than ordinary stress may be contributing.
What will Dr Gyawali assess? Your symptoms, sleep, diet, medications, menstrual or other blood loss, digestive symptoms, medical history and any previous blood-test results will be reviewed.
Do I need to know that my iron is low? No. If you have not been tested, the assessment can help decide whether checking your full blood count and ferritin is appropriate.
Can low iron cause fatigue before anemia develops? Yes, in some people. Ferritin can become low while the hemoglobin result remains within the normal range.
Does fatigue always mean low iron? No. Fatigue may also relate to sleep problems, stress, thyroid conditions, vitamin deficiencies, inflammation, medication or other medical conditions. Symptoms and blood results need to be considered together.
What happens if low iron is confirmed? Dr Gyawali will consider why the iron has become low, whether treatment is needed and whether any further investigation is appropriate.
Where will I be assessed? Assessment takes place in a JCI-accredited facility in Dubai.
WhatsApp the Admin TeamVideo: Could low iron be making you tired?
In this short video, I explain why low iron may contribute to fatigue, how iron stores can fall before anemia develops and when blood testing may be useful.
Why can low iron cause fatigue?
Iron is needed to make hemoglobin, which carries oxygen in the blood. When iron deficiency progresses to anemia, the lower hemoglobin can contribute to tiredness, breathlessness and reduced exercise tolerance.
Some people also experience fatigue when their iron stores are low but their hemoglobin remains normal. However, tiredness is not specific to iron deficiency. The blood results and the wider clinical picture both matter.
Can fatigue occur before anemia is diagnosed?
Yes. Ferritin reflects the body’s stored iron and may become low before the hemoglobin falls.
A normal hemoglobin result does not always exclude iron deficiency. Ferritin may also be affected by inflammation and therefore sometimes needs to be interpreted alongside other results.
Who is more likely to develop low iron?
Low iron is more likely in people who:
- have heavy menstrual bleeding;
- are pregnant or have recently given birth;
- donate blood regularly;
- follow a restrictive diet;
- have a digestive condition affecting iron absorption;
- have continuing blood loss;
- have inflammatory bowel disease or coeliac disease.
This does not mean that everyone in one of these groups will become iron deficient.
When should persistent fatigue be assessed?
Consider medical assessment when fatigue continues for several weeks, affects normal activities or does not improve despite adequate rest.
Symptoms such as reduced exercise tolerance, headaches, dizziness, hair shedding, restless legs, breathlessness or palpitations can occur with iron deficiency, but they can also have other causes.
A full blood count and ferritin are often useful starting results when iron deficiency is being considered. Other tests may be appropriate depending on the history and symptoms.
Could something else be causing the fatigue?
Yes. Poor sleep, stress, thyroid conditions, vitamin deficiencies, inflammation, medication and other medical conditions can all cause persistent tiredness.
The purpose of assessment is not to assume that iron is responsible. It is to decide whether iron deficiency is one reasonable explanation and whether another cause should be considered.
What happens if my iron or ferritin is low?
If blood tests confirm low ferritin, low iron or iron deficiency anemia, the next step is to consider why it has happened.
This may involve reviewing diet, menstrual or other blood loss, previous iron treatment, medications and digestive symptoms. Not everyone needs an endoscopy or specialist gastrointestinal investigation.
Request an assessment
If persistent fatigue is affecting you, you can request an assessment even if you have not yet had your iron checked.
If blood results are available, please bring your recent full blood count, ferritin and any other relevant results.
Use the appointment form below or contact the Admin Team on WhatsApp.