Ferritin

What is ferritin?

Ferritin is a protein found in virtually every cell of the body that has the task of safely storing iron. Without ferritin, free iron could cause damage to tissues and cells. The protein acts as a protective storage site: it holds onto iron until the body needs it.

Iron itself is essential for the production of hemoglobin, the red blood pigment in your red blood cells. Hemoglobin binds oxygen in the lungs and transports it to all organs and tissues in the body. Without sufficient iron, this entire process breaks down, resulting in fatigue and other complaints.

The amount of ferritin circulating in your blood directly reflects how full or empty your iron stores are. This makes ferritin one of the most informative markers for assessing your iron status.

Why is ferritin measured?

Doctors use a ferritin test when they want to know if someone has enough iron in their body. It is the first step in investigating possible iron deficiency or anemia, but also in detecting an excess of iron.

The test is also regularly used for people experiencing persistent fatigue, concentration problems, or unexplained shortness of breath. These symptoms are vague and can have many causes. A ferritin value helps to quickly determine whether a disturbed iron metabolism plays a role.

In addition, ferritin is valuable for monitoring progress during iron treatment. If someone uses iron supplements, the ferritin value shows whether the stores are actually being replenished.

What do abnormal values ​​mean?

A low ferritin value

When ferritin drops below the reference value, this indicates that the iron reserves in the body are depleted or are running out. This is an early signal that an iron deficiency may exist, sometimes even before the hemoglobin value visibly drops. At a more advanced stage, low ferritin can indicate iron-deficiency anemia, a form of anemia in which red blood cells contain too little hemoglobin to transport oxygen properly.

Symptoms associated with low ferritin include:

• Persistent fatigue and a feeling of listlessness
• Dizziness, particularly when standing up
• Difficulty concentrating
• Rapid shortness of breath during exertion
• Headache
• Palpitations
• Tinnitus

It is important to realize that these symptoms can also occur in other conditions. A blood test will provide clarity regarding the cause.

A high ferritin value

An elevated ferritin value can indicate an excessive accumulation of iron in the body. This can occur in hereditary conditions where iron is poorly excreted, such as hemochromatosis. However, ferritin is also a so-called acute-phase protein: in the case of inflammation, infections, or liver disorders, the level can rise without there being an actual iron excess. A high value therefore always requires a broader assessment by a doctor.

When is it useful to have ferritin measured?

There are several situations in which determining ferritin yields useful information. Have you been suffering from unexplained fatigue for a long time, do you feel out of breath more easily than normal, or do you have difficulty concentrating? Then a ferritin test can provide an initial indication of the state of your iron metabolism.

People at increased risk of iron deficiency can benefit from periodic measurements. Think of pregnant women, women with heavy periods, vegetarians and vegans, or people who exercise intensively. For them, it is useful to monitor their iron status regularly so that deficiencies are detected and addressed in a timely manner.

A repeated measurement is also valuable after starting treatment with iron supplements. The ferritin value shows whether the intake actually has an effect on the build-up of reserves. Always discuss abnormal results with a doctor before starting or adjusting treatment yourself.