Haemochromatosis is an inherited disorder in which iron levels in the body slowly build up over many years, which is why it's sometimes called iron overload disorder.

The excess levels of iron can then trigger symptoms such as:

Read more about symptoms of haemochromatosis.

What causes haemochromatosis?

Haemochromatosis is an inherited condition caused by a faulty gene called HFE, that allows a person to absorb too much iron from food. Normally, the body only absorbs as much as it needs.

The excess iron starts building up in the body and causing problems.

Read more about the causes of haemochromatosis.


If haemochromatosis is left untreated, the extra iron accumulates in the body, usually in organs, such as the heart and liver.

This can lead to potentially serious complications such as:

Read more about complications of haemochromatosis.


Haemochromatosis responds well to treatment, which aims to remove excess iron from the body.

The usual treatment is quite simple. Blood is removed from the body on a regular basis – about the same amount taken in a blood donation, around 500ml (roughly a pint).

This leads to an overall drop in iron levels.

For people unable to use phlebotomy for medical reasons, a medication called deferasirox can be used as an alternative. This is known as chelation therapy.

Read more about treating haemochromatosis.


Routine screening for haemochromatosis is not offered by the NHS because it's a relatively uncommon condition.

However, if a close family member (a parent, brother or sister) is diagnosed with haemochromatosis you may want to consider getting tested for the condition yourself. Initial screening is done by blood test.

Read more about diagnosing haemochromatosis.

Living with haemochromatosis

Most people will be able to keep their haemochromatosis symptoms under control, but there are steps that can be taken to keep iron levels low and prevent complications.

For example:

  • avoid taking iron supplements and eating foods fortified with iron, such as breakfast cereals
  • reduce the amount of vitamin C you consume, as this increases absorption of iron and helps it deposit in some organs
  • avoid drinking too much alcohol, especially with meals, as this can increase iron absorption and cause liver disease – if you do have some degree of liver disease you may be advised to avoid alcohol completely

Who is affected

Haemochromatosis is uncommon in general terms, although it's one of the most common genetic (inherited) conditions in England.

As many as one person in 200 may be affected.

Symptoms usually start in adults between the ages of 30-50. Symptoms in women are often delayed because their iron levels are reduced when they have a period.

Haemochromatosis is most common in people of white European ethnic background – particularly people of Irish descent.

Information about you

If you have haemochromatosis, your clinical team will pass information about you on to the National Congenital Anomaly and Rare Diseases Registration Service (NCARDRS).

This helps scientists look for better ways to prevent and treat this condition. You can opt out of the register at any time.

Find out more about the register.


Alan was 55 when he was diagnosed with haemochromatosis or iron overload disorder – a condition where the body contains too much iron. He describes how he learned to manage the condition by changing his diet and having venesection treatment several times a year.

Media last reviewed: 20/05/2016

Next review due: 20/05/2018

Role of iron in the body

The main role of iron in the body is to help transport oxygen in the blood to vital organs.

Iron combines with a protein in red blood cells to form a substance called haemoglobin.

When we breathe in, the oxygen in our lungs is attracted to the iron in haemoglobin and combines with it to form oxyhaemoglobin.

This is transported around the body by blood cells, and oxygen released wherever needed.

Iron overload

Having too much iron in your body is known as iron overload.

Causes of iron overload other than haemochromatosis include:

  • the blood disorder thalassaemia
  • chronic liver disease
  • having a condition that requires frequent blood transfusion, such as sickle cell anaemia
  • drinking beer brewed in iron containers 
  • excess iron intake from iron pills or injections
  • long-term dialysis
  • rare inherited diseases that affect red blood cells, such as atransferrinaemia or aceruloplasminaemia

Page last reviewed: 29/07/2014

Next review due: 29/11/2016